ID 501531 - PTGui presets give an error when importing with the C_CameraSolver node if additional views exist

Problem summary
PTGui presets give an error when importing with the C_CameraSolver node if additional views exist.

Customer reported version
nuke.12.2v9

Customer reported platform
windows10

Steps to reproduce
1) From NukeX, Read in footage.
2) Create a C_CameraSolver node and attach the footage upstream to create additional views.
3) In the C_CameraSolver Properties bin, select the preset dropdown for PTGui(pts) and select SetupRig to locate a .pts file.
4) Select and open any valid .pts file, observing any errors.

Expected behavior
The SetupRig .pts file selection should update the cameras and rig.

Actual behavior
An error is given when attempting to update the camera rig while having more than one View. "Import failed. Please select a valid template."

Workaround
Add the C_CameraSolver node, then import the .pts file before creating additional views.

Reproduced by Support in:
NukeX 13.1v2 - Windows 10, macOS 10.15
NukeX 13.1v1 - Windows 10
NukeX 12.0v1 - Windows 10
NukeX/CaraVR 2.1v4 11.3v6 - Windows 10
NukeX/CaraVR 2.1v4 11.3v1 - Windows 10, macOS 10.15 - regression

Does not occur in:
NukeX/CaraVR 2.1v3 - 11.2v7 - Windows 10


Earliest version tested
NukeX 11.2v4 - This issue doesn't appear in this version and has regressed