Installed Open Project on Ubuntu 18.04 with Postgres database.

In Open Project, I chose the Russian interface language.

When I try to enter text in Russian in fields and forms I get an error:

_PG::UntranslatableCharacter: ERROR: character with byte sequence 0xd0 0x97 in encoding "UTF8" has no equivalent in encoding "LATIN1" _

How do I fix this problem?

We do need a UTF-8 encoded database, so please choose UTF-8 encoding and LC_COLLATE LC_TYPE ru_RU.UTF-8. This answer on stackoverflow might help: https://stackoverflow.com/questions/12490497/postgresql-character-type-for-russian-utf-8-db-creation

Best

Oliver