Other CDE restarts after Login

I installed CDE 2.3.1 on 64-bit FreeBSD 12.1 on my laptop. The installation worked well.
After I start CDE and type my name and password correctly, the screen becomes black and it returns to the login screen and same thing happens again. What should I do?
Thats a good Idea, but i cant return to the commandprompt/unixshell to type commands 😅
when i use the combinations, nothing is happening (Ctrl, Alt, F2)
Im stuck in the login screen to type my username and password, after i did it correctly, it loads cde again and i must type my pw and username again and again.🤷🏻‍♂️
Regarding dtlogin: When you have access to a shell, either through single user mode or key combination, check out if you have ksh93 (/usr/local/bin/ksh93) installed. If not install it.

Also, check out if inetd and rpcbind is running and that you have the following entries in /etc/inetd.conf

dtspc   stream  tcp4    nowait  root    /usr/local/dt/bin/dtspcd /usr/local/dt/bin/dtspcd
cmsd/2-5    dgram rpc/udp4 wait root /usr/local/dt/bin/rpc.cmsd rpc.cmsd

If they are not running add the following to /etc/rc.conf


Then start the daemons.

# service inetd start
# service rpcbind start

After that, test if everything is working.

# /usr/local/dt/bin/dtlogin -nodaemon