If you are using 3ds Max 2021 with Python 2 and using paths with UTF-8 characters in them there is a chance that the plugin is unable to load when you start 3ds Max.
To resolve the issue please do the following:
❗Note: This solution is applicable only on Windows 10.
- Open the Control Panel.
- Go to Clocks and Region.
- Click on Region.
- In the Region dialog that opens, click on the Administrative tab.
- Click on the Change system locale...
- In the Region Settings dialog, enable the Beta: Use Unicode UTF-8 for worldwide language support.
- Click OK for the changes to take effect.
Once you have updated the Locale settings, startup 3ds Max. The plugin should load and you should be able to export assets seamlessly.