Starting back in May, OpenStreetMap went through a transition to require OAuth 2.0 for authentication. Some software didn't get updated until close to the deadline. In particular, OsmAnd was updated around February with release later. Your January version lacked this required update.
this post was submitted on 27 Jul 2024
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OpenStreetMap + App = OsmAnd!
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OsmAnd is a great open source Maps mobile app that uses OpenStreetMap!
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Well it seems then that the fdroid repo is outdated, or at least in Droidify which I use for fdroid repos. Hopefully it catches up soon.
Thanks for the clarification