I’m new to wordpress and so to the general builders’ world 
I’m utilizing the most recent WordPress model and all of the themes are up to date.
The problem I’m having is, I’m not in a position to edit the Sidebar widget, as an illustration, I attempted in Mismo theme, then in Storefront and so forth. The sidebar widget simply will not be customised irrespective of which theme I take advantage of.
Getting beneath error, screenshot can also be hooked up
TypeError: Can not learn properties of null (studying ‘size’)
at p (https://instance.com/wp-includes/js/dist/block-serialization-default-parser.min.js?ver=eb2cdc8cd7a7975d49d9:2:1856)
at f (https://instance.com/wp-includes/js/dist/block-serialization-default-parser.min.js?ver=eb2cdc8cd7a7975d49d9:2:1144)
at i (https://instance.com/wp-includes/js/dist/block-serialization-default-parser.min.js?ver=eb2cdc8cd7a7975d49d9:2:759)
at Fn (https://instance.com/wp-includes/js/dist/blocks.min.js?ver=69022aed79bfd45b3b1d:10:35954)
at fe (https://instance.com/wp-includes/js/dist/customize-widgets.min.js?ver=1fddf6d27e5c3aeddd54:7:17581)
at https://instance.com/wp-includes/js/dist/customize-widgets.min.js?ver=1fddf6d27e5c3aeddd54:7:17924
at Array.map (<nameless>)
at https://instance.com/wp-includes/js/dist/customize-widgets.min.js?ver=1fddf6d27e5c3aeddd54:7:17916
at Object.bt [as useState] (https://instance.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=17.0.1:9:46710)
at e.useState (https://instance.com/wp-includes/js/dist/vendor/react.min.js?ver=17.0.1:9:10899)'''
Issues I’ve tried-
- Tried switching to totally different themes
- Updating wordpress to newest model
- Uninstalling plugins like Yoast search engine optimisation, WooCommerce, Jetpack, Basic Editor and many others.
Any assistance is enormously apprciated
