Sounds like it is
relative path issue. At times, after deployment the path referenced as a source for images, stylesheets, etc is not correctly formed. This leads to no file found at the location referred because of which images don't download or style-sheets does not get applied.
You would need to make sure that the path is correct such that file is found and used.
I would suggest you to use this Tip and resolve the path correctly before setting the source of the file:
Resolving Paths in a Multi-Folder WebSite[
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