ClosedSnappymail doesn't work

I updated CP to the latest version.
Change Logs says “Replace Rainloop with SnappyMail”
Should it be working already?
In my panel in the webmail tab a blank page opens without any errors … xxx.example.com/snappymail/index.php.
If I manually change to xxx.example.com/rainloop, the rainloop opens as before and everything works as usual.

today I get 500 Internal Server Error as I try to run snappymail …

The problem was the recaptcha plug set in the rainloop. When disabled, snappymail starts and you can login
Now I have a problem logging into admin.

I checked:

• login and password rainloop - does not work
• login and password snappymail.php - does not work
• login and password /usr/local/lscp/cyberpanel/rainloop/data/data/default/application.ini - does not work

I was able to log in.

• /usr/local/lscp/cyberpanel/rainloop/data/_data_/_default_/configs/application.ini comment out the admin_password line (;admin_password =)
• generate a new password by trying to log in as admin (https://cp.example.com/snappymail/?admin)
• log in using the new password from /usr/local/lscp/cyberpanel/rainloop/data/_data_/_default_/admin_password.txt
• change the password in the panel after logging in