Images don't display when publishing to HTML

I have yet to find a solution to this problem. When I publish a course to HTML and preview it in a browser, no images display, not a single one; there's only text. This has happened to me both times I completed and published a course in version 11.1. To give you a better idea of what's going on, a co-worker worked on one of these courses in her version of Lectora yesterday and published it with no problems; the course displayed as it should. I then accessed the course to make some edits, then published it. When I published it, no images! I did not change any publishing settings as we publish our courses in the same manner every time. Today, she accessed the course again to attempt publishing it and now even for her it has no images. It's as though my version of Lectora is corrupting files in some way. If anyone has the slightest indication of what may be causing this, I desperately need your advice. Thank you!

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