On a Synology DSM 2415+ DSM 6.0.2-8451 Update 9 - which previously was using a STARTSSL Certificate that expired this week.
Will not allow for adding a Let’s Encrypt certificate. I removed all other certificates - only a self signed one is shown and the error message is constantly “The operation failed. Please log in to DSM again and retry”
I checked logs - no entry showing successful deletion of certificates.
I confirmed the Synology Web Server is running and port forwarding for Lets Encrypt is connected for Ports 80 and 443 (using FIOS). So, I know that is not the problem.
Any advice on something I didn’t think of would be greatly appreciated.