Dear all,
I deeply apologize this issue. (Actually, not only this issue but last update too.)
I could not find the cause of this issue, but database updating process might not be executed according to the symptom you already reported.
So I’d respectfully ask you to deactivate this plugin once and activate again.
I know @rengifo already reported that:
Disabling and enabling the plugin the error occurs equally.
This is true because the error would happen again during deactivating and activating process before the database updating process finish.
But after you see the same error message find, this plugin should work properly.
Uninstalling and reinstalling would process exactly in the same manner.
Again, I’d appreciate your reporting this issue and thank you all for your kind cooperation.