Gutenberg is not showing up

Hello, a year ago I was using Gutenberg on my website:?https://brainybutterfly.com?and then I stopped working. Now when I started the website again, Gutenberg is not showing up at all. I tried deactivating all the plugins but it’s still showing the error:?The editor has encountered an unexpected error.

I am also posting the error here.

TypeError: t.styles?.filter is not a function
at https://brainybutterfly.com/wp-content/plugins/gutenberg/build/edit-post/index.min.js?ver=5631478ae3ad8b887c46:46:308
at Object.useMemo (https://brainybutterfly.com/wp-content/plugins/gutenberg/build/vendors/react-dom.min.js?ver=18:1:115217)
at e.useMemo (https://brainybutterfly.com/wp-content/plugins/gutenberg/build/vendors/react.min.js?ver=18:1:9875)
at https://brainybutterfly.com/wp-content/plugins/gutenberg/build/edit-post/index.min.js?ver=5631478ae3ad8b887c46:46:265
at Ha (https://brainybutterfly.com/wp-content/plugins/gutenberg/build/edit-post/index.min.js?ver=5631478ae3ad8b887c46:46:703)
at St (https://brainybutterfly.com/wp-content/plugins/gutenberg/build/vendors/react-dom.min.js?ver=18:1:47627)
at $s (https://brainybutterfly.com/wp-content/plugins/gutenberg/build/vendors/react-dom.min.js?ver=18:1:120574)
at Sl (https://brainybutterfly.com/wp-content/plugins/gutenberg/build/vendors/react-dom.min.js?ver=18:1:88649)
at kl (https://brainybutterfly.com/wp-content/plugins/gutenberg/build/vendors/react-dom.min.js?ver=18:1:88577)
at bl (https://brainybutterfly.com/wp-content/plugins/gutenberg/build/vendors/react-dom.min.js?ver=18:1:88440)

Can anyone help me to resolve this error? Thanks

The page I need help with: [log in to see the link]