I just installed the plugin, followed the onboarding and on the last step an error occured. No idea how I could help troubleshoot?
Same issue here, also when you exit the onboarding and try to create a board I get this

Looks like a firewall issue. Are you creating this on a staging environment? Would you please inbox me the credential if possible.
Same thing is happening to me on the demo site.
I've messaged you.
Yups I always test new stuff on a staging and not directly on production #bestpractice. Why would a htaccess password block me from creating a board? Does it need to ping home to you folks just to create a board?
We found the issue. Will release an update soon.
We just released 0.73 which will resolve the issue.