SSL certificate

[KeithY]

The langstone-cutters-rc.175.s1.nabble.com resolves to 162.253.133.81
 
Server Type: nginx/1.19.10
 
However none of the common names in the certificate match the name that was entered (langstone-cutters-rc.175.s1.nabble.com). Hence we receive errors stating 516 upstream certificate mismatch

[GregChapman]

If you are reporting this because you want SSL on your forum then this post sets out the process to follow (amongst some other stuff relevant to that topic).
https://support.nabble.com/Forum-is-not-embedding-on-Weebly-td7613364.html#a7613397