Downloads fail for several applications

Example: If I try to install SMS Backup+ 1.5.10, I get a "download failed" error followed by the twice the same URL : https://f-droid.org/repo/com.zegoggles.smssync_1554.apk If I try the same URL from my computer browser I get a 404 Not Found error. While I did find this app in the list I seen in my phone, I do not find SMS Backup+ in the https://f-droid.org/packages/ list Remark: https://f-droid.org/packages/com.zegoggles.smssync page still exists ...

Other example: If I try to install Slight Backup last version 0.5.2, I get a "download failed" error followed by the twice the same URL : https://f-droid.org/repo/de.shandschuh.slightbackup_19.apk If I try the same URL from my computer browser I get a 404 Not Found error. I do find Slight Backup on f-droid.org/packages/ list but at earlier version 0.4.5 pointing to the https://f-droid.org/repo/de.shandschuh.slightbackup_16.apk in the repository.

It seems to be some discrepancy between the (updated) list in the app in my phone and the repository contents.