Studio 2024 desktop: error with Language Weaver Provider app login

I'm using plug-in 2.0.0.3 integrated in Studio 2024 and am trying to add Language Weaver as a TM provider. 

After selecting Language Weaver Cloud and EU for my account region, I chose "RSW ID SSO" and entered my RWS login email and password. 
I get "Authentication failed": Error reading JObject from JsonReader. Path '', line 0, position 0.

Here's the error report:  
/cfs-file/__key/communityserver-discussions-components-files/160/010724171551_5F00_Authentication-failed.txt

What am I doing wrong?

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