Error on install

[davidgilbertson]

Hi, I've got a new install of QGIS, tried installing your plugin and got an error after clicking Install in the plugin manager.

Couldn't load plugin 'qgis-maptiler-plugin' due to an error when calling its classFactory() method 

TypeError: 'QVariant' object is not subscriptable 
Traceback (most recent call last):
  File "C:\PROGRA~1/QGIS33~1.5/apps/qgis-ltr/./python\qgis\utils.py", line 423, in _startPlugin
    plugins[packageName] = package.classFactory(iface)
  File "C:\Users/david/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\qgis-maptiler-plugin\__init__.py", line 36, in classFactory
    return MapTiler(iface)
  File "C:\Users/david/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\qgis-maptiler-plugin\maptiler.py", line 55, in __init__
    locale = QSettings().value('locale/userLocale')[0:2]
TypeError: 'QVariant' object is not subscriptable


Python version: 3.9.18 (heads/master:5eba59e, Feb  1 2024, 20:02:10) [MSC v.1929 64 bit (AMD64)] 
QGIS version: 3.34.5-Prizren Prizren, 4b308492 

Python Path:
C:/PROGRA~1/QGIS33~1.5/apps/qgis-ltr/./python
C:/Users/david/AppData/Roaming/QGIS/QGIS3\profiles\default/python
C:/Users/david/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins
C:/PROGRA~1/QGIS33~1.5/apps/qgis-ltr/./python/plugins
C:\PROGRA~1\QGIS33~1.5\apps\grass\grass83\etc\python
C:\Users\david\Documents
C:\Program Files\QGIS 3.34.5\bin\python39.zip
C:\PROGRA~1\QGIS33~1.5\apps\Python39\DLLs
C:\PROGRA~1\QGIS33~1.5\apps\Python39\lib
C:\Program Files\QGIS 3.34.5\bin
C:\PROGRA~1\QGIS33~1.5\apps\Python39
C:\PROGRA~1\QGIS33~1.5\apps\Python39\lib\site-packages
C:\PROGRA~1\QGIS33~1.5\apps\Python39\lib\site-packages\win32
C:\PROGRA~1\QGIS33~1.5\apps\Python39\lib\site-packages\win32\lib
C:\PROGRA~1\QGIS33~1.5\apps\Python39\lib\site-packages\Pythonwin
C:/Users/david/AppData/Roaming/QGIS/QGIS3\profiles\default/python
C:/Users/david/Maps/QGIS-Training-Data-master/solution

The plugin gets installed, but not enabled, and if I try and enable it, I get the error again.

[lazaa32]

Hi @davidgilbertson it seems like a issue with locales in Windows.
Could you please open Python console in QGIS (Ctrl+Alt+P) and insert these two lines of code and let me know what you get as a result?

from qgis.PyQt.QtCore import QSettings
QSettings().value('locale/userLocale')

[davidgilbertson]

I get NULL.

In settings, I had "Override System Locale" unticked.

I have now ticked it and manually set a locale...

...and your plugin installs correctly. (FWIW I didn't need to restart QGIS)

Thanks for pointing me in the right direction.

Should I close this or do you want to add a check for null there?

[lazaa32]

Happy to hear you got the plugin working. I didn't even know about this option in settings.
Please, keep the issue open, I will create a bug fix PR and close this issue from the PR.