(my english is bad, so i'll use pictures)
Group "admin" exists, it has permissions, prefixes etc

but this happens when try to apply changes made in web editor

i can create any group, define it's perms using commands and this will work, but LP cannot apply changes made in web editor even for "default"!

Hi there, can you please make sure you're on the latest update from here please https://ci.lucko.me/job/LuckPerms/

There was a fix made for this previously