Add xurl package

unitartucs/thesis.cls

@@ -261,6 +261,7 @@
     \newunderlinetype\@underLine{%
         \leaders\vrule height -0.25ex depth \underLineDepth % Close underline like in Word
     }
+    \usepackage{xurl} % Allow arbitrary line breaks in urls
     \NewDocumentCommand\underLine{+m}{{\@underLine#1}}
     \DeclareUrlCommand{\Hurl}{% https://tex.stackexchange.com/a/169734
         \def\UrlLeft##1\UrlRight{\@underLine##1} % Use \@underLine directly to allow line breaks in urls