Custom script

[ppgcollegue]

  I'm new to Canvas and I'm experiencing certain problems with two instances. Does someone knows how to troubleshoot a custom CSS? For further information  I did not custom anything or change it I just got it and started to used ir as the canvas team gave it to me.

" The custom CSS used in your institution is causing the arrows not to show in the Spanish version. We can't troubleshoot Institution Custom CSS put in Canvas from the institution." 

Really appreciated all the help I can get. Thanks