Issue Description

At runtime, when you upload a file to an image or file attachment control and the file has no extension, no user-friendly error message shows.

Resolution

  1. Ensure you have K2 Five (5.1) installed.
  2. Download and install the K2 Five (5.1) November 2018 Cumulative Update from K2 Partner and Customer Portal.
  3. Download the K2 Five (5.1) November 2018 Cumulative Update FP7 from K2 Partner and Customer Portal.
  4. Install the K2 Five (5.1) November 2018 Cumulative Update FP7 to apply the fix.
  5. Refresh the browser cache.