Johannes_B wrote:I have never seen this before. It seems to be something your editor is giving you, it is not a LaYeX error.
Can you show a minimal working example that reproduces this message along with a screenshot?
Doing further research, it was indeed a LaTeX error occurring when JPEG images (or in my case PDFs including JPEGs) were used, but a recent MiKTeX update fixed it. I advise anyone using MiKTeX, therefore, to run MiKTeX update as soon as possible. Still, the error seems not to affect the final result at all.
More details about the bug can be found here: https://sourceforge.net/p/miktex/bugs/2605/