Hi,
I know that you recommend unity 2020lts and I am downloading it now however your software does work with unity 2021lts but it appears that there have been some API changes.
First I removed the visual scripting package as mentioned in the forum posts.
Then I import the PowerQuest stable version.
I get API changes message as shown below:
I chose the option "Yes, for these and other files that might be found later" and the import worked.
I then went to the window -> PowerQuest menu option and followed the general instructions for loading the project which worked fine.
I played the demo and all appears to work fine.
Just thought I would mention this as I have seen in posts that you are taking the stance that the 2021 visual scripting issue is a unity problem but this API change message may indicate that there are changes in unity that you are not aware of.
Regards,
Anthony