Please follow the below template, it will help us to help you!
Please ensure that you are running the latest version of the beta code.
Run pihole -up to update to the latest, then verify that the problem still exists before reporting it.
Problem with Beta 5.0:
I’m unable to add or remove entries from the white/blacklist through the admin panel. I have success editing these entries using the
pihole command. When removing an entry, it looks as if it’s being removed, but upon refresh, it shows again.
Whenever I use the panel to edit entries, I notice this error in the pihole-FTL.log:
[2020-01-28 19:40:46.409 3249] Warning: Invalid regex blacklist filter "^adtrack(er|ing)?[0-9]*[-.": Unmatched [, [^, [:, [., or [= (error code 7)
I tried to use the panel to remove that entry but no luck.