Widget Area error(S)

No matter what i try it say the same thing: “here is a problem with widget, please contact the developers”.
I have no clue on what to do next; i’ve already tried google, your forum, everything i could.
The thing is that i can’t modify any of the widgets due to this strange error.

Some help would be much appreciated.

Thank you in advance

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Hello,

Thank you very much for choosing our theme and for contacting us.

Please install this plugin https://wordpress.org/plugins/classic-widgets/ then you will see widgets.

If you have any questions please feel free to contact us.

Best Regards

[Author]

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