"Hey, I am writing my thesis, and everything was going fine, but suddenly, a compiler error appeared, and I have no idea where the problem is. Please help me!"
here are the Errors and they are all at output.lof, 21
pdfTeX error (ext1): \pdfendlink cannot be used in vertical mode.
Paragraph ended before \language@active@arg" was complete.
Argument of \language@active@arg" has an extra }.
That looks like an error in a figure caption. Please post the file output.lof here, perhaps as attachment. That is the list of figures file and it probably shows the figure caption with the issue.