Login to Trimble account fails:

I created some years ago a account for sketch free web version on a PC.
And made some designs there.
Now after years not working I try to login again on a MAC book.
I renewed my Password by requesting a new one. So my account name is still valid and working.
When I try to login a bailout says in German “Ihre Anmeldesitzung ist abgelaufen.” what means “Your registration session has expired.”.
What can I do?

I would even delete my old account and make a new one but now chance to do so.

I haven’t seen Expired before. It was only expired two days ago, which suggests some change you made affected the state of the account.

You should contact Support, and see if they can revive the account. Use this form:

https://help.sketchup.com/en/contact

Someone else reported today that their free account had expired. They cleared cookies and logged into their account again with no problem.