Do Not Install Gutenberg 6.2.0

TypeError: Cannot read property ‘attributes’ of undefined
at Object.gr (https://xxx.com/wp-content/plugins/gutenberg/build/blocks/index.js?ver=1564574963:2:130581)
at t.value (https://xxx.com/wp-content/plugins/qubely/assets/js/qubely_build.min.js?ver=1.0.5:1:983633)
at qi (https://xxx.com/wp-content/plugins/gutenberg/vendor/react-dom.min.fa9ca8c8.js:130:198)
at ui (https://saratogabars.com/wp-content/plugins/gutenberg/vendor/react-dom.min.fa9ca8c8.js:133:320)
at https://xxx.com/wp-content/plugins/gutenberg/vendor/react-dom.min.fa9ca8c8.js:158:377
at unstable_runWithPriority (https://xxx.com/wp-content/plugins/gutenberg/vendor/react.min.f4c1469c.js:27:36)
at Vc (https://xxx.com/wp-content/plugins/gutenberg/vendor/react-dom.min.fa9ca8c8.js:158:360)
at Sc (https://xxx.com/wp-content/plugins/gutenberg/vendor/react-dom.min.fa9ca8c8.js:158:144)
at Z (https://xxx.com/wp-content/plugins/gutenberg/vendor/react-dom.min.fa9ca8c8.js:156:492)
at Kc (https://xxx.com/wp-content/plugins/gutenberg/vendor/react-dom.min.fa9ca8c8.js:155:52)

Yup, my site updated Gutenberg automatically this morning, and now my editor is toast. Not sure how this managed to escape regression testing and get into production. Very disappointing. I’m running the latest WP (5.2.2).

Works fine for me. What browser?

I’m using Chrome on my iMac.

I’m also using Mac Chrome.

Perhaps there’s another plugin that is conflicting.

Good call. I disabled Qubely’s Gutenberg Blocks plugin, and then Gutenberg 6.2.0 started working.

Thanks @jebeebe for getting back with the details what caused the issue.