ERR_UNKNOWN_URL_SCHEME while access external css js file

I have opened a .html file from file manager and it will return the following url "content://com.mi.android.globalFileexplorer.myprovider/external_files/Test/index.html", but this .html file access the external .css file ("content://com.mi.android.globalFileexplorer.myprovider/external_files/Test/style.css"). But it show "**Failed to load resource: net::ERR_UNKNOWN_URL_SCHEME**" this error.

Reproduce the case with Test/index.html opened from the file manager, where it references Test/style.css through the shown content:// URL. Inspect the Android InAppBrowser handling of these resource URLs and verify completion when the external CSS and JavaScript resources load without ERR_UNKNOWN_URL_SCHEME.

Written by the indexing model from the issue text.