Sorry but I already tried it and still the same error.
Logs :
Code
ERROR: CCurlFile::FillBuffer - Failed: HTTP returned error 403
2019-10-02 19:46:40.639 T:2208297872 ERROR: CCurlFile::Open failed with code 403 for https://addons.libreelec.tv/9.0.9.0/H3/arm/addons.xml.gz.sha256:
2019-10-02 19:46:40.640 T:2208297872 ERROR: Open - failed to open source <https://addons.libreelec.tv/9.0.9.0/H3/arm/addons.xml.gz.sha256>
2019-10-02 19:46:40.640 T:2208297872 ERROR: CRepository: failed read 'https://addons.libreelec.tv/9.0.9.0/H3/arm/addons.xml.gz.sha256'
2019-10-02 19:46:40.656 T:2208297872 DEBUG: CRepositoryUpdater: done.
2019-10-02 19:46:40.659 T:2693788560 DEBUG: CAddonDatabase: SELECT repo.id FROM repo .. took 3 ms
2019-10-02 19:46:40.659 T:2693788560 DEBUG: CAddonDatabase: no valid repository matching 'repository.libreelec.tv'
I don't understand why this repo is unavailable since months and nobody cares I mean this is LibreElec's repo not just an extra repo from unknown source..