A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
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updated to 2019.4.3f1 - and it seems to be fixed, at least it works for me!
Any workarounds until the update for 2019.4 LTS is out? We updated to LTS to prevent exactly those untested things - it's a little bit frustrating...