Can listen but not talk?

[Marcus Wolschon]

Using Mumble/murmur 1.3.0 as a server this may happen.
The current workaround is to use Mumble 1.2.19 as a server.
(1.2.3 does not work anymore because a certificate times out. 1.2.3a has no sound because opus was not yet supported.)

For some reason this did not work right after uninstalling 1.3.0 and installiung 1.2.19 but later it worked.
No cause known.