Found typo causing error in CRM_Utils_System_DrupalBase->formatResourceUrl()
Your code path is slightly different from your files path:

code: .../web16/web/sites/...

files: .../web16/websites/...

That looks like a typo - check your directories and resources settings at Administer &gt; System Settings &gt; Directories and Administer &gt; System Settings &gt; Resource URLs