Martin D

Strange... did you try on a fresh NodeRed install ? In my case, I am re-building the docker host to test it's setup process, so the NodeRed I am using...

here's the clone process:  and how Node-Red reacts after "open existing project":  When I open the credential settings, I can enter the credentials - but hitting save will...

Just as a data point, I am getting the same on a Quadro T2000, I think that is close to a 1600 series

Switching to the windows app fixed it for me. Performance is good, and we had a lot of fun with it already! Many thanks.