c# – > org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog

FAILURE: Build failed with an exception.

Error: Execution failed for task ‘:app:extractDeepLinksDebug’.

org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.

Could someone please tell in which file I’m going wrong?
I made a github repository so I think the problem is related to it.
The repository works fine but the main doesn’t