Sync Error when I use golobal proxy network

sync error when i use golobal proxy network on windows 10 pc , the anki poped up a message : “A network error occurred.Error details: error sending request for url () : error trying to connect : unexpected EOF during handshake.” I used a golobal network proxy to visit google or other website in china ,.as you know ,in this country has great fire wall on the internet to block some website that government do not allow their people to visit. when I change the proxy model to global proxy ,and click the anki button ‘async’ ,the error is occurred. I think there are some little bit bugs in the application should be fix. can you check it please , thanks very much.

Please see Syncing with AnkiWeb - Anki Manual