I still have this issue as well and have not heard back from support. I did run the test you mentioned and it does return errors. I have no idea how to fix those, though, as my SSL cert is up to date and available.
I did find something similar for Twilio as opposed to LinkedIn, but not sure what to do or where to modify anything to fix it…
https://github.com/twilio/OpenVBX/issues/252
I am having a similar problem. Please see the attached screenshot. Any help would be appreciated. Thanks!
View Screenshot
Scott
