Problem with the plugin

About two weeks ago, I downloaded and installed the plugin. Everything was perfect until a few days ago …
When trying to enter the panel to edit or create a new box, the browser stops responding. Try using other browsers and the same thing happens.
I should add that the half of the page where the boxes are edited does not load correctly.

I will attach some screenshots`

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This is an error that appears in the console, before entering a new box
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