Whatsapp TwinApp Whatsapp web issue

[shaileshjohar]

Please tell us some basic information before asking for help:
Model Name: ROG Phone 3 ASUS_I003DD
Product: WW_I003D
Device: ASUS_I003_1
Build: QKQ1.200419.002.WW_Phone-17.0823.2008.78-0
Board: kona
Kernel: Unknown release unknown version
Connection: W.I.F.I.
Device ISO8601: 2021-02-23 23:29:34.608+0400
Phone Type: G.S.M.
Network Type: L.T.E.
Firmware Version:
Rooted or not: No
Frequency of Occurrence: Permanent since 1 day.
APP Name & APP Version (If your issue relates to the app): Whatsapp Twinapp 2.21.3.19
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
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Suddenly my Whatsapp web for Whatsapp TwinApp (secondary app) stopped syncing with my phone. After deleting the linked PC, I am unable to get past the Device Linking screen below.
Nothing happens despite several taps on "Link a Device" tab. Eventually get the error message as in second screenshot.
Already tried removing whatsapp completely (both main and secondary apps), cleared storage data and cache, re-signed in on whatsapp.
The primary app works without any issue.

[Gustav_ASUS]

@shaileshjohar Sorry for the late response.
Please update your device to 2102.143 firmware if you haven't already, then reinstall WhatsApp and try again.
By the way, I noticed that you were running old firmware at the time. Do you have a Tencent-branded phone that has been flashed by any chance?