Camera Uploads not Working

I am relatively new to PLEX. I am having issues with Camera upload feature. This is one of the main reasons for me to choose Plex.

The camera uploads just gets stuck( Manual as well as Automatic) at attached screen on my iPhone as well as iPad both running IOS 11.

I am trying to upload to a customized library. I can see errors in the Logs

“Couldn’t accept new TLS Connection: Operation Cancelled.”

Please Help

attached the screen shot