After a few searches, I figured PHP allows still recognizes paths even if slashes and backslashes are mixed with each other. And so I found out that the directory nlm30 really is missing. I realize that the steps including “npm install” and “npm run build” failed as shown in the screenshot.
I have no idea how to resolve this especially when it states that the problem is most likely with the OJS3 package and that I can’t find a similar topic in the forum. Has anyone encountered this too?