New Katalon install stick on "Activating..." dialog

I’m trying to run Katalon 8.2.0 on Ubuntu Linux x64. When I start it the first time a dialog comes up that says “Activating…” with a back & forth progress indicator. This never finishes so it’s not clear what is supposed to happen next and how I get around this problem.

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@bionel     

mhm… i have no idea what may go wrong in this case.
for my previous use cases, it was passing that step and freeze at the further splash (which opens another small window sometime unnoticed)
@dave3 what is the java version in use on your machine?
also, please try to run katalon from command line and paste the output of the terminal here.