Unable to join public groups

[pcdinh]

Hi,

I am unable to join public groups: Android, Mac, Windows clients report the same error: User Not Found. When I use web client, I get the following error

Not found
There is no Telegram account with the username you provided.

Method: contacts.resolveUsername Url: N/A Result: {"_":"rpc_error","error_code":400,"error_message":"USERNAME_NOT_OCCUPIED"} Stack: h@https://web.telegram.org/js/app.js:23:25735 d@https://web.telegram.org/js/app.js:24:15237 w@https://web.telegram.org/js/app.js:26:10548 Cn/this.$get</g.prototype.$broadcast@https://web.telegram.org/js/app.js:13:14047 m@https://web.telegram.org/js/app.js:16:9820 Cn/this.$get</g.prototype.$broadcast@https://web.telegram.org/js/app.js:13:14047 l@https://web.telegram.org/js/app.js:12:27570 Jt/this.$get</</<@https://web.telegram.org/js/app.js:12:29172 Cn/this.$get</g.prototype.$eval@https://web.telegram.org/js/app.js:13:12662 Cn/this.$get</g.prototype.$digest@https://web.telegram.org/js/app.js:13:11144 Cn/this.$get</g.prototype.$apply@https://web.telegram.org/js/app.js:13:12947 Jt/this.$get</<@https://web.telegram.org/js/app.js:12:28388 ae.event.dispatch@https://web.telegram.org/js/app.js:4:2735 ae.event.add/f.handle@https://web.telegram.org/js/app.js:3:31539
All of groups I tried is fine to others

@BitcoinCore (BTC)
@BitSharesDEX (BTS)
@counterparty (XCP)
@DashDigitalCash (DASH)
@etcrussia (ETC Russia)
@ethclassic (ETC Main Group)
@FactomFCT (FCT)
@litecoin (LTC)
@MaidSafeCoin (MAID)
@MoneroCurrency (XMR)

https://telegram.me/litecoin

However, I asked some of my friends to access those groups (for the first time), they reported the same error.

Ex: I and my friends in Vietnam can not join any group here https://combot.org/telegram/top/chats Same error

Is it because Vietnam IP addresses are blocked or something?

[sokomo]

I have the same issue when trying to access those public groups. I tried to access using Android client, and my IP and phone number are from Vietnam.

[zhukov]

I think it's some server-side restriction. You should contact Telegram support, the app itself has nothing to do with it.