[Module:Cache] createEntry failed error

i am using ubuntu 20.04 with cyber panel openlitespeed and i am getting lots of following error on LiteSpeed web admin console

[Module:Cache] createEntry failed, may due to no permission to write file or file is updating.

i am getting lots of this error.

i tried to run this command after to check if all is ok

rm -rf /usr/local/lsws/cachedata/*

ls -l /usr/local/lsws | grep cachedata

after using this command i found following data

root@ssdnodes:~# ls -l /usr/local/lsws | grep cachedata
drwxr-xr-x 3 nobody nogroup 4096 Jun 3 21:40 cachedata

it should be nobody:nobody right???

how can i solve this?