I had the same issue with the '...project generation have a problem' when using CubeMX v5.4. Reverting CubeMX v5.2 resolved the error issue, but I experienced the same issue as you - a 'device not found' error when opening the project in Keil. Taking...

I had the same issue with the '...project generation have a problem' when using CubeMX v5.4. Reverting CubeMX v5.2 resolved the error issue, but I experienced the same issue as you - a 'device not found' error when opening the project in Keil. Taking...