This is one problem:
But your big problem is your AS (autonomous system) which is the Digital Ocean one.
Reverse DNS (PTR) exists and claimes to be: do1.ichas.net
WARNING: No matching A-Record exists for your Reverse-DNS.
DNS is INCONSISTENT.
Please request your Admin or Provider to fix this.
Uceprotect says: "We saw that many hosts in AS14061 are (mostly) bad and sends spam (yes, it's mail-related, as I stated before) to the world, then all the IP under this AS are blacklisted".
So you can't do anything else than move your moodle out of this provider ...
BTW, but which browser uses Uceprotect in accessing websites?
This is what I understood.