exact same problem here too, after updating the letsencrypt container.
the solution is posted a couple posts below.
tl:dr = letsencrypt changed something (auth method over port 443 disabled)
1. you have to make sure now that tcp port 80 is forwarded on your router (internet gateway) to your unraid server (be aware that unraid uses default tcp 80 for its webinterface, so map tcp port 80 extern to something else intern like tcp 81)
2. edit/update the container settings > edit letsencrypt in the unraid docker tab and set the http port to 81 or whatever to used for your portmapping on your router.
3. also change the variable HTTPVAL from false to true, its found in " show more settings"
HTTPVAL:
true
Flag to switch validation method to HTTP (over port 80) if set to 'true'
exact same problem here too, after updating the letsencrypt container. the solution is posted a couple posts below. tl:dr = letsencrypt changed something (auth method over port 443 disabled) 1. you have to make sure now that tcp port 80 is forwarded on your router (internet gateway) to your unraid server (be aware that unraid uses default tcp 80 for its webinterface, so map tcp port 80 extern to something else intern like tcp 81) 2. edit/update the container settings > edit letsencrypt in the unraid docker tab and set the http port to 81 or whatever to used for your portmapping on your router. 3. also change the variable HTTPVAL from false to true, its found in " show more settings" HTTPVAL: true Flag to switch validation method to HTTP (over port 80) if set to 'true'