I just managed to fix it. There was a typo in the debian/auth_cas.load file.
Yours: LoadModule authcas_module /usr/lib/apache2/modules/mod_auth_cas.so
It should be: LoadModule auth_cas_module /usr/lib/apache2/modules/mod_auth_cas.so
That fixes it. Now it just needs to be updated to 1.0.7. That's it!
I just managed to fix it. There was a typo in the debian/ auth_cas. load file.
Yours: apache2/ modules/ mod_auth_ cas.so
LoadModule authcas_module /usr/lib/
It should be: apache2/ modules/ mod_auth_ cas.so
LoadModule auth_cas_module /usr/lib/
That fixes it. Now it just needs to be updated to 1.0.7. That's it!