LiteSpeed + Plesk: Set missing Cache Roots doesn't work

Hi there,
Im using newest versions of:

Plesk Obsidian
Litespeed 1.3-0 Plesk Extension.

When I checked it the last time it worked. At the evening I extend my DigitalOcean Droplet (only thing what I have changed)...

Today I want to check my litespeed installations and the following error occured:

"Cache Root Not Set"

-> "Cache Root Setup" -> "Set missing Cache Roots" -> "LSCache is not included in the current LiteSpeed license. Please purchase the LSCache add-on or upgrade to a license type that includes LSCache and try again."

I tried this too:
bash <(curl
still the same.

When I use this command, following wrning is happening:
[root@~]# systemctl daemon-reload
[root@~]# service lsws restart
Redirecting to /bin/systemctl restart lsws.service
Warning: lsws.service changed on disk. Run 'systemctl daemon-reload' to reload units.

It seems that the cache is still working...

Please check my images:

I posted a support ticket but only got this as an answer:
"In LiteSpeed plugin for plesk, when you checking cache root, it saying "set missing cache root".
Please click it to see if it helps." :(.

Thank you all in advance,