Tailwind v4: How to find css-syntax-error error cause?

[Blaumaus]

After upgrade, the console is filled with errors like this - although styles are looking fine on the website and I'm not really sure what's causing this issue. Any suggestions how the cause of this problem can be traced?

Here's my tailwind.css file - https://github.com/Swetrix/swetrix/blob/e99f0d9b1c29e15be33e015e12a6766ae01cfc77/web/app/styles/tailwind.css

Edit 1: If I remove everything from the config and just keep bare @import 'tailwindcss'; - the issue is still present.

Edit 2: Removing the contents of all .css files does not fix the issue, so it's something else...

[awilkins-tv]

We're getting the same issue for our angular application as well: