Dear Martin-Ng,
Thank you for your message.
If you're able to reach TeamViewer using port 80 please use the following instructions to fix your issue.
First, stop the daemon with the command:
sudo teamviewer daemon stop
Please open your choice of a file editor and add the following line in the global.conf file that can be located here: /opt/teamviewer/config/global.conf and add the following:
[int32] AllowedConnectionProtocols = 3
After this, please restart the TeamViewer daemon:
sudo teamviewer daemon start
In case you have any further problems after this change, please contact us again and send us the new log file by running the following command:
sudo teamviewer ziplog
Thank you in advance and I look forward to hearing from you.
Best regards,
Christian
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