Sounds like your VPS hoster is Contabo which is known to have recurring issues with their apt repositories, unrelated to YunoHost I think
cf similar discussion in Solved - Error 500. "PUT" /yunohost/api/update/all - Repository problems in Contabo?
Sounds like your VPS hoster is Contabo which is known to have recurring issues with their apt repositories, unrelated to YunoHost I think
cf similar discussion in Solved - Error 500. "PUT" /yunohost/api/update/all - Repository problems in Contabo?