since today there is a problem with our login: it is possible to login to the admin page, but if we then try to do any action in admin page we are automatically returned to the login screen again.
There also occur two warnings on the login screen:
Warning: Unknown: open(/var/tmp/s/p/sess_spouidat2n4eopl80cv7t9khh2, O_RDWR) failed: Permission denied (13) in Unknown on line 0
Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (2;/var/tmp) in Unknown on line 0
Unfortunately I don't know what the problem might be and I have little knowledge about PHP.
Thank you in advance for any help oder advice!