ID 443326 - [C] If a PSD is not found Flix only gives an option to reload or exit when opening in Sketching App

Problem summary
If a PSD is not found Flix only gives an option to reload or exit

Customer reported version
flix_6.3.3

Customer reported platform
10.15

Steps to reproduce

1) Create a .PSD file and import it to Flix.

2) On the Flix server, find where the newly created .PSD file is located.

3) Rename or delete that .PSD file.

4) Double click on the panel (the one imported in step 1) to open it in Photoshop.

Expected behaviour

A .png version of the panel should open in Photoshop and/or a pop-up saying the original file (.PSD) can't be found with an option to open the flattened version of the image (if a .png is available) or just cancel the operation.

Actual behaviour

Flix throws an error message with the only option to exit the application or Reload. Both options result in changes since the last save being lost.

Reproduced by support
This bug has been reproduced in:

6.3.3