Error while running from Linux (Arch-based) - window.Telegram.WebApp undefined type

[AliAlmasi]

This is an screenshot from the message box that explains the error:

on Linux (installed from pacman) telegram-desktop 5.2.3-1

I guess the problem is related to your end (I'm just guessing, I'm not an expert).

If you need any other info from my client or my desktop, I'd be happy to help.

[AliAlmasi]

I found out that my client is not update because of the mirror that my pacman is using. Apparently repo.iut.ac.ir doesn't like to be updated.

I am now trying a different mirror. Sorry for that.

[AliAlmasi]

So I updated my client to version 5.4.1-1 which is the latest in the extra repo of Arch Linux and I'm still facing the same error.
I'm now a little bit more sure that it is your end's fault (again, I'm not completely sure).