We are sorry for the trouble, As described, when you open the response form you get the Flash warning.
Adding Flash content in PDF files is now disabled and no longer supported. You will see one of the below dialogs when you encounter Flash content in a PDF.
When Flash Player is not installed on your system:
When Flash Player is installed on your system: A message is displayed asking you to turn off using Flash Player.
Choose one of the following:
OK - Disables the preference Use Flash Player For Playing 3D and Multimedia Content. FlashPlayer is not used to play flash content. The PDF uses the native OS media players, like Windows Media Player on Windows or QuickTime on macOS, to play the audio or video content in the PDF.
Ask me later - The preference Use Flash Player For Playing 3D and Multimedia Content is enabled, and FlashPlayer plays the flash content. The message is displayed again if the user opens a PDF file with flash content.
For more information please look at the help pages listed below: