Solved Android 3cx Video Conference app - I/O Error

[avolkov]

We've got error while conneting to conference with android APP. Meanwhile desktop browser connecting without any troubles.
Where we can find clues to solve this problem?

 

[NickD_3CX]

Hi!

Does this happen only for this meeting or have you tried to join others too?
Also, have you tried from some other Internet Connection (different WiFi, over LTE, etc).

 

[avolkov]

Hello!
It happened with any meeting our users created. we try diffrent providers and mobile operators - same result.
It's interesting that if we choose PC version mode in mobile chrome, we can connect to conference, video and audio work as planned.

 

[StefanW]

The issue is related to your custom-installed SSL certificate. It misses the intermediate certificates.
Chrome adds such things by itself but apps do not...

Go here https://www.sslshopper.com/ and fix the SSL certs for your nginx or switch to a 3CX managed certificate to not have such issues.

<<YOUR CERT>>
The certificate is not trusted in all web browsers. You may need to install an Intermediate/chain certificate to link it to a trusted root certificate. Learn more about this error. You can fix this by following GlobalSign's Certificate Installation Instructions for your server platform. Pay attention to the parts about Intermediate certificates.