Missing sourcecode warnings

Hey there!

I am using sentry-cli to upload source maps for a react app we are building.

While running sentry-cli releases files $VERSION upload-sourcemaps $BUILD_FOLDER --rewrite --validate I get a lot of warnings that sourcecode is missing.

I checked and I think all these files are modules we import from node_modules packages.

How could I fix these warnings?

Attaching a screenshot and wishing you a wonderful day.

Best,
Piotr