I am using Lightroom 5.6 on my Acer Windows 8.1 PC. when I try and Export a photo it gives me the following error:
Unable to Export:
An internal error has occurred: WIn32API error 2("The system cannot find the file specified.') when calling ShellExecuteExW from AgWorkspace.shellExecute
I Have restarted my PC to no avail.
In your Export Dialog, near the bottom is the Post-processing section. Makes sure it is set to something other than blank. "Do Nothing" for example.