I just spend like 6h trying to fix a build error of my Web site on #netlify. Tried all kinds of weird stuff. Turns out the problem was a file containing a โ€žรผโ€œ in the filename. ๐Ÿคฆโ€โ™‚๏ธ
@ceedee666 i feel with you and perhaps it will comfort you to hear that I also had such experiences several times.
The good thing is that Iโ€™ve always learnt a lot whilst trying to find the reason

@htammen this time I only learned that โ€žรผโ€œ might leed to strange errors. In hindsight itโ€™s clear why. The โ€žรผโ€œ was in the name of a image file via a markdown file that is imported via markdown into the JS page. That caused obscure JS errors during the page build. And I tried to resolve these by upgrading npm packages etc.

But in principle Iโ€™m with you. There is usually a lot to learn when debugging errors.