Cannot add anything to blacklist from web interface

[fabdub]

Problem with Beta 5.0:
I cannot add anything to blacklist : domain, regex, wildcard.
it gives me this error :

It works from pihole -b command line.
I can actually delete it afterwards from web int.

Debug Token:
https://tricorder.pi-hole.net/zi6tg6ukv6

[jfb]

I see you are running the DietPi distribution of Pi-hole. Please contact them for support, as their distribution is different than the pi-hole.net distribution and they have had some reported 5.0 problems.

[MichaIng]

For reference if others land here:

usermod -aG pihole www-data
apt install php7.3-intl

Assuming that PHP version is 7.3: php -v

[fabdub]

Well that worked! thanks a lot.