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 4.7 installed.
  2. Download and Install the K2 4.7 March 2018 Cumulative Update from K2 Partner and Customer Portal.
  3. Download the K2 4.7 March 2018 Cumulative Update FP38 from K2 Partner and Customer Portal.
  4. Install the K2 4.7 March 2018 Cumulative Update FP38 to apply the fix.
  5. Refresh the browser cache.