I am a beginner. I'm having trouble with an error in EasySave

I am using EasySave3 for Unity assets.
As you can see in the attached image, an error is displayed under ES3.
It is not even saved.
Please tell me what to do.
Thank you.
If you use the AutoSave function, you can use it correctly.
Unity version is 2022.3.5f1.
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