Everything should now work as expected for sure. Please see:
https://download.osmc.tv/kodi/addons/nexus/addons.xml.gz?mirrorlist
https://download.osmc.tv/kodi/addons/nexus/addons.xml.gz?sha256
I did some server maintenance for the upcoming Vero V launch to prepare our infrastructure for increased demand and during the middle of the day on 18th August I found an issue (permissions problem) that would prevent Kodi add-on updates from working properly. This should have been fixed earlier this evening, but there was another issue.
Thanks for your patience. If you can confirm everything is now working at your end as expected that would be appreciated.
Best,
Sam