Code:
SOGS initialization failed: (sqlite3.OperationalError) attempt to write a readonly database
[SQL: SELECT name FROM sqlite_master WHERE type='table' ORDER BY name]
(Background on this error at: https://sqlalche.me/e/14/e3q8).
Error was solved by changing owner of the sogs.db file (possibly /var/lib/session-open-group-server/sogs.db )