Today we got the answer, and it’s POSITIVE 
Here is the complete reply:
Dear Hrvoje Bogner,
LWG has looked at the licence, and it does appear that the licence is compatible (we reviewed the English version here - Open License | Portal otvorenih podataka)
In using this data, please make sure to add your data source to Contributors - OpenStreetMap Wiki, linking to both the data source and the licence. In addition, when adding changesets with information from data sources with this licence, please be sure to indicate in the changeset the particular data source and version. This is because the licence specifies that usage attribution should "include the date of its last update” which of course could differ on a changeset by changeset basis. Please communicate this to the Croatian mapping community.
Kind regards
Kathleen Lu, on behalf of LWG
–
OpenStreetMap Foundation
St John’s Innovation Centre
Cowley Road
Cambridge
CB4 0WS
United Kingdom
A company limited by guarantee, registered in England and Wales.
Registration No. 05912761.–
[Ticket#2024031110000106]
This will also be reflected in the LWG minutes when they are finalized.