TeamViewer has pulled the latest version following user reports that the remote access software was displaying “Connection not established. Authentication Cancelled Error” errors and blocking incoming connections.
According to customers, these connection issues affect any device running TeamViewer 15.35.7, regardless of the software and hardware configuration.
“Version 15.35.7, on random computers of differing ages, Windows OSs and hardware, refuse to accept incoming connections, even lan connections,” one user reported Sunday.
“I’ve uninstalled, re-installed the client, etc., and tried everything I can think of, but this machine will not allow me to connect from any of my other machines,” another added.
A TeamViewer community moderator confirmed the company was aware of the issue on Monday and said the problem had been reported internally.
One day later, TeamViewer removed the 15.35.7 update from its servers and advised all affected users to downgrade to a previous version.
“The update file has been pulled from the updates as well as our main website while our developers work on the issue,” the community moderator said.
Workaround until a fixed version is available
Until the company provides a new build, customers can go through the following steps to deploy an older and working version:
Go to Extras > Options >Advanced on affected systems, disable automatic updates, set the app to never check for updates, and click OK.
Uninstall the existing version, but make sure you don’t delete your current configuration by checking the “delete settings” option.
Reinstall an older version.
While TeamViewer has not provided an official workaround for this known issue, it did remove the problematic version from its download page to allow customers to download TeamViewer 15.35.5, the previous release, which is unaffected by these connection problems.
“Affected users can download version 15.35.5 via our main downloads page,” the TeamViewer moderator added.