ValueError: Enable must be a boolean value

[thelabcat]

Describe the bug
Cannot update the addon with the button

To Reproduce
Steps to reproduce the behavior:

1. Open the Preferences window, and navigate to the addon.
2. Click the Update now button.
3. Error is raised:

Traceback (most recent call last):
  File "C:\Users\zargu\AppData\Roaming\Blender Foundation\Blender\3.0\scripts\addons\MB-Lab\addon_updater_ops.py", line 234, in execute
    updater.set_check_interval(
  File "C:\Users\zargu\AppData\Roaming\Blender Foundation\Blender\3.0\scripts\addons\MB-Lab\addon_updater.py", line 511, in set_check_interval
    raise ValueError("Enable must be a boolean value")
ValueError: Enable must be a boolean value

Additional context
The addon is enabled, and incidentally is the latest version, though that doesn't seem to have caused the upgrade issue.