I fear this will be the first of several MRs like this one. From !54280 (merged) we'll need to configure the muonSelectionTool using the IsRun3Geo property to set if we're running on run2 or run3 data/mc (default is run2); if the wrong setup is used, the tool crashes. Most likely there will be few places here and there where this will need to be configured properly.
In this case the problem was mentioned in https://its.cern.ch/jira/browse/ATR-25753