- Plesk 12.5 for Linux
When expanding all tabs in Plesk Health Monitor, or after installing Social Login extension, the following error appears:
PLESK_INFO: 400 Bad Request
Request Header Or Cookie Too Large
This is a Plesk bug with ID PPPM-7626, which was fixed in Plesk Onyx 17.8.
For Plesk Onyx 17.5 and earlier Plesk versions, consider upgrading to the latest Plesk version.
As a workaround, follow these steps: