WordPress Widget page showing error message

The widget page in WordPress is showing the following error message:

*There has been a critical error on this website. Please check your site admin email inbox for instructions.*

I don’t know how to get this to work again. I never received an email about the critical error. Help! I can use the WordPress interface, but my website development experience is pretty minimal.

https://preview.redd.it/fgl6z6kwqnnb1.png?width=1596&format=png&auto=webp&s=dfb7fe834b29640a3aaf5e1fe4bc75e060322c80

 

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