I cannot start my F-Droid. It is a bit similar to a related thread, but not the same.
I can download and install F-Droid from the official site. However, right after I launch it, it crashes. In the recent apps, F-Droid is still there with a full black preview picture.
Is there something I can try besides entering developer mode?
Does the crash ask you to send the crash log to the developers? If so, please do so so the crash is known.
Otherwise, to figure out how to fix it, Scoop is a great way to more easily get crash logs.
I agree with @Licaon_Kter about trying a newer version. If none of those work, you could always use an alternative F-Droid Client like Droid-ify or Neo Store but in that case please still help report the bug so it can be fixed