Warning: Cannot modify header information - headers already sent

[x8Haider]

Hello,

I'm facing below error in Marketplace extension:

Warning: Cannot modify header information - headers already sent by (output started at public_html/app/code/Apptha/Marketplace/Controller/Product/Category.php:102) in /home/devomarto/public_html/vendor/magento/framework/Stdlib/Cookie/PhpCookieManager.php on line 148

Warning: Cannot modify header information - headers already sent by (output started at public_html/app/code/Apptha/Marketplace/Controller/Configurable/Attributes.php:95) in /home/devomarto/public_html/vendor/magento/framework/Stdlib/Cookie/PhpCookieManager.php on line 148

I'm using Magento 2.3 Community edition

[orloopssolutions]

Apptha perfectly working on PHP 7.1 and Magento 2.2. so skip other versions. before you do this give read write and execute permission to files . after install change it back to normal .every problems you have faced because of Apptha can't modify some files.... so try this .. I have solved this problem without any code change... (01-02-2020)