Fitting>Add/Multiply Model not working

[dehoni]

Describe the bug
When trying to open Fitting>Add/Multiply Model it produces the error:
line 1199, in actionAddMult_Models File "sas\qtgui\Utilities\ModelEditors\AddMultEditor\AddMultEditor.py", line 84, in init AttributeError: module 'sas.sascalc.fit.models' has no attribute 'find_plugins_dir'

To Reproduce
Steps to reproduce the behavior:

1. Go to Fitting
2. Click on Add/Multiply Model
3. See error

Expected behavior
Opening of the Model Creation Window

Screenshots
If applicable, add screenshots to help explain your problem.

SasView version (please complete the following information):

• Version: 6.1.1

Operating system (please complete the following information):

• OS: Windows 11 and Linux

Installation method (please complete the following information):

• Installed: Windows Installer and ISIS Idaas

Additional context
Also when trying to select a Plug-in model in the fitting perspective, it fails with the error:
Traceback (most recent call last): File "sas\qtgui\Perspectives\Fitting\FittingWidget.py", line 1418, in onSelectModel File "sas\qtgui\Perspectives\Fitting\FittingWidget.py", line 1589, in respondToModelStructure File "sas\qtgui\Perspectives\Fitting\FittingWidget.py", line 2364, in SASModelToQModel File "sas\qtgui\Perspectives\Fitting\FittingWidget.py", line 2400, in fromModelToQModel AttributeError: module 'sas.sascalc.fit.models' has no attribute 'find_plugins_dir'

[butlerpd]

THIS IS EXTREMELY BAD -- plugin models do not work at all!!! You cannot use or create any model that is not already part of the distribution.

[smk78]

Plugins and Add/Multiply still work in 6.1.0 so this bug was introduced in 6.1.1.

[butlerpd]

Indeed it was @smk78. We will be dropping back to 6.1.0 for tomorrow's tutorial unfortunately.