ID 376441 - Project crashes when opening Export Window [ NukeStudio - Hiero ]

Problem summary
Users script experiences crashes, when the export window is opened within NukeStudio/Hiero.

The issue was first determined as a Shotgun issue, but the script appears to be corrupted due to another problem.

The Script has been fixed for the user, although the initial problem reproduction is unknown.

Customer reported version
nuke.11.1v3

Customer reported platform
windows10

Steps to reproduce

1) Open the attached script.

2) Attempt to export the project via selecting 'Export...' from the Project window conext menu. 

Result: NukeStudio/Hiero crashes to desktop, throws crash reporter.

Workaround
Unknown.

Reproduced by support

This bug has been reproduced in:
Nuke11.2v5 - Windows 7 - Mac10.13 - CentOS6.9
Nuke11.2v1 - Windows 7
Nuke11.1v1 - Windows 7
Nuke11.0v1 - Windows 7
Nuke10.5v1 - Windows 7
Nuke10.0v1 - Windows 7
Nuke9.0v1 - Windows 7 - Mac10.13 - CentOS6.9

Earliest version tested
- This issue appears to be in all versions of the product

Expected behaviour
Project should open the Export window without issues.

Actual behaviour
Project crashes when opening the Export window.