Admin is already logged in

Hi,
After entering the password in the sitecake.php I get the message „Admin ist bereits eingeloggt." (“Admin is already logged in.”) And the login pop-up doesn’t go away.
What can I do to stop that?

If you are not logged in from another browser, … please create a ticket. Here:
https://support.sitecake.com/hc/en-us/requests/new

Maybe the customer is logged in at the same time or has not logged out?
But what can you do to end this status?

If I throw away everything from sitecake, all directories and files, and reinstall sitecake, will this message no longer appear? And will my content still be there?

Hi, just try to delete sitecake-temp dir

After I deleted sitecake-temp dir I get a white page.

Hi, can you send your site url and sitecake password so I can check it out? Send it as private message please.