I keep my installation up-to-date , whenever the update email arrives I go through the update procedure without a problem.
When it arrived recently I was forced to login again.
However this time I get this error.
Error : Form security failed. Please reload the form and check that your cookies are enabled. If you use a proxy server, you must configure Matomo to accept the proxy header that forwards the Host header. Also, check that your Referrer header is sent correctly.
There is no proxy on the webserver side.
I do use a proxy for my browser , but the same error shows even when I switch the proxy off and go direct.
I manually upgraded the matomo installation by downloading the latest zip file , unpacking it , overwriting the current installation and using the commandline to update the database , this all went swimmingly.
Still unable to login though.
Any ideas ?