A PHP session was created by a session_start() function call. This interferes with REST API and loopback requests. The session should be closed by session_write_close() before making any HTTP requests.
What would be the procedure to follow in this case? There is some code for implementation.
We reviewed our theme code and confirmed that we don’t use session_start() or session_write_close(). Therefore, the issue might be coming from another source or plugin. Please check your other plugins or custom code to identify where these session functions are being called. If you need further assistance, feel free to reach out.
The Unyson plugin is known to cause various issues. Therefore, we recommend migrating to the Redux framework if you don’t have any pages built with the Unyson page builder.
It can be done under Jevelin (left sidebar) > Framework upgrade.