title: An error occurred on the server when processing the URL. Please contact the system administrator
body: <p>When I tried to modify Microsoft forefront Unified access login.asp page and pages that comes with it , </p>
  
  <p>I prepared my custom files for css; inc files ;  InstallAndDetect ..etc </p>
  
  <p>but When i inserted those files under CustomUpdate folders i got this error :</p>
  
  <p><em>" An error occurred on the server when processing the URL. Please contact the system administrator. "</em></p>
  
  <p>I tried files i prepared before by putting them in the place of the default files propvided by the system.
  Ofc the naming is respecting when using customupdate files!!</p>
  
  <p>Do you have any idea how can I solve this issue??</p>