Bert,
I just logged into my account and I don't see a issue with login issues. At least with today browsing between forums.
Maybe tomorrow I will see something different.
However I do recall noting before that your session folder permissions are weird.
The folder is 777 with a owner group of 501.501
The actual session files are 600 with a owner group of 99.99.
It appears that the owner group is allowed access via your account but the file permissions are odd.
At least for newer files generated.