A PHP session is created by a session_start() function call. This interferes with the REST API and loopback requests. The session must be closed by session_write_close() before HTTP requests are made.
Where do I have to go to to fix that
This topic was modified 3 years ago by ericsteffens.
This is often caused by plugins. Deactivate all of them as a test. Does the message no longer appear? Then activate them bit by bit until the message comes back – then you have found the guilty plugin.
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