42.0 Update: Stuck on step 4 of 9 downloading new content

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I'm on Ubuntu 22.04., after the 42.0 update, when I start BTD6, it gets stuck at the Step 4 of 9 downloading new content screen. The Button doesn't move at all, 0% ...
Any Ideas?

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Terminal outpu:t

[2024-04-10 11:43:40] Checking for available updates...
[2024-04-10 11:43:40] Downloading manifest: https://client-update.akamai.steamstatic.com/steam_client_ubuntu12?t=2944583710
[2024-04-10 11:43:40] Manifest download: send request
[2024-04-10 11:43:40] Manifest download: waiting for download to finish
[2024-04-10 11:43:41] Manifest download: finished
[2024-04-10 11:43:41] Download skipped: /steam_client_ubuntu12?t=2944583710 version 1709846872, installed version 1709846872, existing pending version 0
[2024-04-10 11:43:41] Nothing to do


So it seems, the final Version is installed?

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New installation didn't work :(