Screen sharing stopped working on Wayland

Hello everybody,
Since the last stable update I can’t do screensharing with neither Firefox nor Chromium anymore under Wayland.
The portal where you have to select your window/ screen appears, but then the screen just stays blank.

I can’t find anything special in the logs for the pipewire service, but for pipewire-media-session there is this:

 Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: Stopped Multimedia Service Session Manager.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: Started Multimedia Service Session Manager.
Apr 14 15:18:58 laurenz-ManjaroPC pipewire-media-session[32351]: core 0x5603ef6f14b0: can't find protocol 'PipeWire:Protocol:Native': Operation not supported
Apr 14 15:18:58 laurenz-ManjaroPC pipewire-media-session[32351]: can't start monitor: Operation not supported
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Main process exited, code=exited, status=161/n/a
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Failed with result 'exit-code'.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Scheduled restart job, restart counter is at 3.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: Stopped Multimedia Service Session Manager.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: Started Multimedia Service Session Manager.
Apr 14 15:18:58 laurenz-ManjaroPC pipewire-media-session[32353]: core 0x55fb11d2c4b0: can't find protocol 'PipeWire:Protocol:Native': Operation not supported
Apr 14 15:18:58 laurenz-ManjaroPC pipewire-media-session[32353]: can't start monitor: Operation not supported
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Main process exited, code=exited, status=161/n/a
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Failed with result 'exit-code'.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Scheduled restart job, restart counter is at 4.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: Stopped Multimedia Service Session Manager.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: Started Multimedia Service Session Manager.
Apr 14 15:18:58 laurenz-ManjaroPC pipewire-media-session[32358]: core 0x559a908ee4b0: can't find protocol 'PipeWire:Protocol:Native': Operation not supported
Apr 14 15:18:58 laurenz-ManjaroPC pipewire-media-session[32358]: can't start monitor: Operation not supported
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Main process exited, code=exited, status=161/n/a
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Failed with result 'exit-code'.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Scheduled restart job, restart counter is at 5.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: Stopped Multimedia Service Session Manager.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Start request repeated too quickly.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: pipewire-media-session.service: Failed with result 'exit-code'.
Apr 14 15:18:58 laurenz-ManjaroPC systemd[23625]: Failed to start Multimedia Service Session Manager.

Am I the only one with a this problem?
The last update also introduced some pipewire problems, but these could be fixed and should be included in the new update (i guees) [Stable Update] 2021-02-28 - Kernels, Plasma 5.21.1, Frameworks 5.79, Firefox, Thunderbird, Python - #219 by MajorMayer
Thanks in advance

okay i already found a fix here: pipewire upgrade breaks audio, pipewire-media-session can't start / Multimedia and Games / Arch Linux Forums

Got tired of doing this for my scrubs so created a script for now until they fix this w/ above link’s recommendations