Issue Description

When building a nativescript application, the error of
"Error: Could not load CSS from app.css: Error: The specified module does not exist: null" appears. The solution I have found which doesn't break the code, is as follows. In nativescript/core/application/application-common.js on line 27 change "let cssFile = './app.css';" to "let cssFile = ''" . Now the warning error message no longer appears.

Reproduction

Simply run the applications. trace logging my need to be set to true in the application.

Relevant log output (if applicable)

Error: Could not load CSS from app.css: Error: The specified module does not exist: null

Environment

No response

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