Studio Saving Error in copying "Student Grade Assignment" unit in open edx

[HlaThit]

Hello,
I have the problem of " The studio server encountered an error " in copying "Student Grade Assignment" unit and get studio saving error. I use Ironwood version.
How can I solve it?
Please help me.

[pdpinch]

Sorry if I've said this already, but have you tried upgrading to version 0.9.0?

[HlaThit]

Yes, I have tried edx sga version 0.9.0.
In version 0.9.0, my course with studio error can not be opened and sga does not work on other courses.
Adding "ADDL_INSTALLED_APPS": ["edx_sga"], in /edx/app/edxapp/lms.env.json and /edx/app/edxapp/cms.env.json causes server error.

So, When I added version 0.8.3 again, studio saving error is still and new sga can be getted.

Do upgrading version 0.9.0 need some extra requirments to connect?

[pdpinch]

I'm not aware of any additional requirements. Can you share the server error you receive when you try to upgrade to 0.9.0?