On my test server I just ran the latest available upgrade script for Matrix 4 (automatic_upgrades_4-18-4.zip) to upgrade to version 4.18.9 and got the following error:
PHP Warning
Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/home/websites/squiz_matrix/cache)
Is this related to the upgrade script or something else?
Not sure what i have done wrong but it seema i can only login with the IP address. domain.com/_admin login results in refreshing the logon page and adds question mark at the wnd of the url. The domain name is in main.inc.
Is there anything else i should check?
To upgrade i took a server image and used this image to build a new cloud server. The domain is pointing to the new IP.