I’m not sure your version of F-Droid supports this, but could you try to open F-Droid and:
- go to “Settings”
- scroll all the way down and activate “Expert mode”
- scroll down again and avtivate “Force old index format”
- go back and try to reload index
I’m not sure your version of F-Droid supports this, but could you try to open F-Droid and: