diff --git a/class/class-mainwp-api-manager-key.php b/class/class-mainwp-api-manager-key.php
index 5ff3db344..8ae4e8ff3 100644
--- a/class/class-mainwp-api-manager-key.php
+++ b/class/class-mainwp-api-manager-key.php
@@ -264,11 +264,13 @@ public function get_purchased_software( $args ) {
 			MainWP_Api_Manager::instance()->get_upgrade_url() . '?mainwp-api=am-software-api',
 			array(
 				'body'      => $args,
-				'timeout'   => 50,
+				'timeout'   => 200,
 				'sslverify' => self::$apisslverify,
 			)
 		);
 
+		MainWP_Logger::instance()->debug( 'Get purchased softwares: ' . MainWP_Utility::value_to_string( $request ) );
+
 		if ( is_wp_error( $request ) || 200 != wp_remote_retrieve_response_code( $request ) ) {
 			// Request failed.
 			return false;
diff --git a/class/class-mainwp-api-manager-plugin-update.php b/class/class-mainwp-api-manager-plugin-update.php
index 21180223a..5f32d332f 100644
--- a/class/class-mainwp-api-manager-plugin-update.php
+++ b/class/class-mainwp-api-manager-plugin-update.php
@@ -171,7 +171,7 @@ public function plugin_information( $args, $bulk_check = false ) {
 
 		$target_url = $this->create_upgrade_api_url( $args, $bulk_check );
 		$default    = array(
-			'timeout'   => 50,
+			'timeout'   => 150,
 			'sslverify' => 1,
 		);
 
diff --git a/class/class-mainwp-db-client.php b/class/class-mainwp-db-client.php
index bf9b9c2d7..a42f46b12 100644
--- a/class/class-mainwp-db-client.php
+++ b/class/class-mainwp-db-client.php
@@ -1112,25 +1112,57 @@ public function get_client_fields( $general = true, $client_id = 0, $field_name_
 			return false;
 		}
 
+		$gene_results = array();
+
+		if ( $general ) {
+			// to fix: missing general fields for client without client fields values.
+			$gene_sql     = 'SELECT f.* FROM ' . $this->table_name( 'wp_clients_fields' ) . ' f WHERE f.client_id = 0 ORDER BY f.field_name ';
+			$gene_results = $this->wpdb->get_results( $gene_sql );
+		}
+
 		if ( $client_id ) { // get fields values of client.
-			$sql = 'SELECT f.*,v.value_client_id, v.field_value as field_value FROM ' . $this->table_name( 'wp_clients_fields' ) . ' f LEFT JOIN ' .
+			$sql = 'SELECT f.*, v.field_value as field_value FROM ' . $this->table_name( 'wp_clients_fields' ) . ' f LEFT JOIN ' .
 			$this->table_name( 'wp_clients_field_values' ) . ' v ON f.field_id = v.field_id WHERE ' . $where . ' ORDER BY f.field_name ';
 		} else {
 			$sql = 'SELECT f.* FROM ' . $this->table_name( 'wp_clients_fields' ) . ' f WHERE ' . $where . ' ORDER BY f.field_name '; // value_client_id to compatible result.
 		}
 
+		$results = $this->wpdb->get_results( $sql );
+
+		$fields_list = array();
 		if ( $field_name_index ) {
-			$results     = $this->wpdb->get_results( $sql );
-			$fields_list = array();
 			if ( $results ) {
 				foreach ( $results as $item ) {
 					$fields_list[ $item->field_name ] = $item;
 				}
 			}
-			return $fields_list;
+			if ( $gene_results ) {
+				foreach ( $gene_results as $gene_item ) {
+					if ( ! isset( $fields_list[ $gene_item->field_name ] ) ) {
+						$gene_item->field_value                = '';
+						$fields_list[ $gene_item->field_name ] = $gene_item;
+					}
+				}
+			}
 		} else {
-			return $this->wpdb->get_results( $sql );
+			$check_list = array();
+			if ( $results ) {
+				foreach ( $results as $item ) {
+					$check_list[ $item->field_name ] = true;
+					$fields_list[]                   = $item;
+				}
+			}
+			if ( $gene_results ) {
+				foreach ( $gene_results as $gene_item ) {
+					if ( ! isset( $check_list[ $gene_item->field_name ] ) ) {
+						$check_list[ $gene_item->field_name ] = true;
+						$gene_item->field_value               = '';
+						$fields_list[]                        = $gene_item;
+					}
+				}
+			}
 		}
+		return $fields_list;
 	}
 
 	/**
diff --git a/class/class-mainwp-db.php b/class/class-mainwp-db.php
index 8338aa998..6fc522eb9 100644
--- a/class/class-mainwp-db.php
+++ b/class/class-mainwp-db.php
@@ -274,6 +274,8 @@ public function get_website_options_array( &$website, $options ) {
 				} else {
 					$get_options[] = $option;
 				}
+			} else {
+				$get_options[] = $option;
 			}
 		}
 
diff --git a/class/class-mainwp-system-utility.php b/class/class-mainwp-system-utility.php
index fdabc7c65..ca0884426 100644
--- a/class/class-mainwp-system-utility.php
+++ b/class/class-mainwp-system-utility.php
@@ -692,18 +692,18 @@ public static function get_child_response( $data ) {
 			}
 
 			if ( isset( $resp['notices'] ) ) {
-				$notices = array();
 				if ( is_string( $resp['notices'] ) ) {
-					$notices = MainWP_Utility::esc_content( $resp['notices'] );
+					$resp['notices'] = MainWP_Utility::esc_content( $resp['notices'] );
 				} elseif ( is_array( $resp['notices'] ) ) {
+					$notices = array();
 					foreach ( $resp['notices'] as $noti ) {
-						if ( is_string( $noti ) ) {
+						if ( ! empty( $noti ) && is_string( $noti ) ) {
 							$notices[] = MainWP_Utility::esc_content( $noti );
 						}
 					}
-				}
-				if ( ! empty( $notices ) ) {
-					$resp['notices'] = $notices;
+					if ( ! empty( $notices ) ) {
+						$resp['notices'] = implode( ' || ', $notices );
+					}
 				}
 			}
 		}
diff --git a/class/class-mainwp-system.php b/class/class-mainwp-system.php
index ce09589f8..cfbe9a2f3 100644
--- a/class/class-mainwp-system.php
+++ b/class/class-mainwp-system.php
@@ -126,7 +126,7 @@ public function __construct( $mainwp_plugin_file ) {
 
 		if ( is_admin() ) {
 			include_once ABSPATH . 'wp-admin' . DIRECTORY_SEPARATOR . 'includes' . DIRECTORY_SEPARATOR . 'plugin.php';
-			$pluginData            = get_plugin_data( $mainwp_plugin_file );
+			$pluginData            = get_plugin_data( $mainwp_plugin_file, true, false ); // to fix issue of user language setting.
 			$this->current_version = $pluginData['Version'];
 			$currentVersion        = get_option( 'mainwp_plugin_version' );
 
@@ -165,7 +165,7 @@ public function __construct( $mainwp_plugin_file ) {
 
 		$systemHandler = MainWP_System_Handler::instance();
 
-		add_action( 'init', array( &$this, 'localization' ) );
+		add_action( 'plugins_loaded', array( &$this, 'localization' ) );
 		add_filter( 'site_transient_update_plugins', array( $systemHandler, 'check_update_custom' ) );
 		add_filter( 'pre_set_site_transient_update_plugins', array( $systemHandler, 'pre_check_update_custom' ) );
 		add_filter( 'plugins_api', array( $systemHandler, 'plugins_api_info' ), 10, 3 );
diff --git a/class/class-mainwp-ui.php b/class/class-mainwp-ui.php
index 5b6907c14..fee2d236a 100644
--- a/class/class-mainwp-ui.php
+++ b/class/class-mainwp-ui.php
@@ -1130,23 +1130,32 @@ public static function gen_groups_sites_selection() {
 	 *
 	 * @uses \MainWP\Dashboard\MainWP_DB::get_websites_count()
 	 */
-	public static function render_header_actions() {
+	public static function render_header_actions() { //phpcs:ignore -- complex method.
 		$sites_count   = MainWP_DB::instance()->get_websites_count();
 		$website_id    = '';
 		$sidebar_pages = array( 'ManageGroups', 'PostBulkManage', 'PostBulkAdd', 'PageBulkManage', 'PageBulkAdd', 'ThemesManage', 'ThemesInstall', 'ThemesAutoUpdate', 'PluginsManage', 'PluginsInstall', 'PluginsAutoUpdate', 'UserBulkManage', 'UserBulkAdd', 'UpdateAdminPasswords', 'Extensions' );
 		$sidebar_pages = apply_filters( 'mainwp_sidbar_pages', $sidebar_pages ); // deprecated filter.
 		$sidebar_pages = apply_filters( 'mainwp_sidebar_pages', $sidebar_pages );
 		ob_start();
-		if ( isset( $_GET['dashboard'] ) ) :
-			$id      = intval( $_GET['dashboard'] );
+		if ( isset( $_GET['dashboard'] ) || isset( $_GET['id'] ) || isset( $_GET['updateid'] ) || isset( $_GET['emailsettingsid'] ) || isset( $_GET['scanid'] ) ) :
+			if ( isset( $_GET['dashboard'] ) ) {
+				$id = intval( $_GET['dashboard'] );
+			} elseif ( isset( $_GET['id'] ) ) {
+				$id = intval( $_GET['id'] );
+			} elseif ( isset( $_GET['updateid'] ) ) {
+				$id = intval( $_GET['updateid'] );
+			} elseif ( isset( $_GET['emailsettingsid'] ) ) {
+				$id = intval( $_GET['emailsettingsid'] );
+			} elseif ( isset( $_GET['scanid'] ) ) {
+				$id = intval( $_GET['scanid'] );
+			}
+
 			$website = MainWP_DB::instance()->get_website_by_id( $id );
 
 			if ( '' != $website->sync_errors ) :
 				?>
 				<a href="#" class="mainwp-updates-overview-reconnect-site ui green button" siteid="<?php echo $website->id; ?>" data-position="bottom right" data-tooltip="Reconnect <?php echo stripslashes( $website->name ); ?>" data-inverted=""><?php esc_html_e( 'Reconnect Site', 'mainwp' ); ?></a>
-				<?php
-			else :
-				?>
+			<?php else : ?>
 				<button class="ui button green <?php echo ( 0 < $sites_count ? '' : 'disabled' ); ?>" id="mainwp-sync-sites" data-inverted="" data-position="bottom right" data-tooltip="<?php esc_attr_e( 'Get fresh data from your child sites.', 'mainwp' ); ?>">
 					<i class="sync icon mainwp-sync-button-icon"></i>
 					<span class="mainwp-sync-button-text">
@@ -1158,7 +1167,7 @@ public static function render_header_actions() {
 					 *
 					 * @since 4.1
 					 */
-					echo esc_html( apply_filters( 'mainwp_site_sync_button_text', esc_html__( 'Sync Dashboard with Site', 'mainwp' ) ) );
+					echo esc_html( apply_filters( 'mainwp_site_sync_button_text', esc_html__( 'Sync Site', 'mainwp' ) ) );
 					?>
 					</span>
 				</button>
diff --git a/pages/page-mainwp-updates-handler.php b/pages/page-mainwp-updates-handler.php
index ac4dacb32..a726583ed 100644
--- a/pages/page-mainwp-updates-handler.php
+++ b/pages/page-mainwp-updates-handler.php
@@ -658,6 +658,7 @@ public static function upgrade_plugin_theme_translation( $id, $type, $list ) {
 			}
 			$result = self::update_plugin_theme_translation( $website, $type, $list );
 			if ( is_array( $result ) ) {
+				$undefined = true;
 				if ( isset( $result['upgrades'] ) ) {
 					$tmp = array();
 					if ( isset( $result['upgrades'] ) ) {
@@ -669,8 +670,13 @@ public static function upgrade_plugin_theme_translation( $id, $type, $list ) {
 				} elseif ( isset( $result['error'] ) ) {
 					throw new MainWP_Exception( 'WPERROR', esc_html( $result['error'] ) );
 				} elseif ( isset( $result['notices'] ) ) {
-					throw new MainWP_Exception( $result['notices'], '', 'MAINWP_NOTICE' );
-				} else {
+					$noti = $result['notices'];
+					if ( ! empty( $noti ) && is_string( $noti ) ) {
+						throw new MainWP_Exception( $noti, '', 'MAINWP_NOTICE' );
+					}
+				}
+
+				if ( $undefined ) {
 					throw new MainWP_Exception( 'ERROR', esc_html__( 'Invalid response retured from the child site. Please try again.', 'mainwp' ) );
 				}
 			}
diff --git a/widgets/widget-mainwp-clients.php b/widgets/widget-mainwp-clients.php
index eace1bcc7..8e887bf24 100644
--- a/widgets/widget-mainwp-clients.php
+++ b/widgets/widget-mainwp-clients.php
@@ -99,19 +99,23 @@ private static function render_clients( $clients ) {
 							</td>
 							<td class="left aligned middle aligned">
 								<?php
+								$contact = false;
 								if ( isset( $client['primary_contact_id'] ) && '' != $client['primary_contact_id'] ) {
 									$contact = MainWP_DB_Client::instance()->get_wp_client_contact_by( 'contact_id', $client['primary_contact_id'] );
-									?>
+									if ( $contact ) {
+										?>
 									<span><?php echo esc_html( $contact->contact_name ); ?> <?php echo ( isset( $contact->contact_role ) && '' != $contact->contact_role ) ? ' - ' . esc_html( $contact->contact_role ) : ''; ?></span><br/>
-									<?php if ( isset( $contact->contact_email ) && '' != $contact->contact_email ) : ?>
+										<?php if ( isset( $contact->contact_email ) && '' != $contact->contact_email ) : ?>
 										<span class="ui small text"><a href="mailto:<?php echo $contact->contact_email; ?>"><i class="envelope icon"></i> <?php echo esc_html( $contact->contact_email ); ?></a></span><br/>
 									<?php endif; ?>
-									<?php if ( isset( $contact->contact_phone ) && '' != $contact->contact_phone ) : ?>
+										<?php if ( isset( $contact->contact_phone ) && '' != $contact->contact_phone ) : ?>
 										<span class="ui small text"><a href="tel:<?php echo $contact->contact_phone; ?>"><i class="phone alternate icon"></i> <?php echo esc_html( $contact->contact_phone ); ?></a></span>
 									<?php endif; ?>
-									<?php
-								} else {
-									echo esc_html_( 'No Contacts', 'mainwp' );
+										<?php
+									}
+								}
+								if ( empty( $contact ) ) {
+									echo esc_html__( 'No Contacts', 'mainwp' );
 								}
 								?>
 							</td>