I have the same problem. Fedora Workstation 29 (64 bit, GNOME) TeamViewer 14.0.14470 (64 bit) I can not log on. Button "Sign In" does not work. One note: Log on is functional only in the first use after a fresh installation. When you reboot the computer and try to log on the second time it does not work. Temporary solution: Purge TeamViewer including config files etc. and install it again. And again, and again, and again... This bug I have seen in several previous versions.
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