We used linux on all of our CI servers, and have never experienced that. It is also the first time I see it ever asked, and I wonder what could be the cause.
Just for me to follow on what you were doing - you already had the repo on an older commit. This was working. Now you pulled a new version, tried running npm i, and that failed with this error.
It feels like the declaration file is not updated or doesn’t exist, for some reason. can you try the following - before running npm i, run npm build:dev and see if it builds correctly. Try npm i then. If that didn’t work, try running npm run clean and then npm i.
The ScriptBaseUrl. was recently added, it is possible that the test tools is referencing an older declaration file that is not updated on your system.
Let me know if that worked! if it didn’t, we will take it from there