Theme demo import error

[FahadIq01]

Warning: sprintf(): Too few arguments in C:\xampp\htdocs\estore\wp-admin\includes\class-bulk-upgrader-skin.php on line 156

[Alexus450]

it is related to this lines with strings they should be like this, if not just edit them in your tgm class php file.
check lines about 3666 and 3674
....
$this->upgrader->strings['skin_update_successful'] = __( '%1$s installed and activated successfully.', 'tgmpa' );
...
$this->upgrader->strings['skin_update_successful'] = __( '%1$s installed successfully.', 'tgmpa' );
...