This block has encountered an error and cannot be previewed

Hello,

I have been using Gutenberg for a while without any issues. Today I started experiencing this error where I am unable to create new posts as I cannot create blocks. The error reads ‘This block has encountered an error and cannot be previewed’.

I have not added any new plugins or made any new updates. I get the error on all browsers on my mac.

The diagnosis on Chrome reads as follows:

JQMIGRATE: Migrate is installed, version 1.4.1
?v=2.0:6 WebSocket connection to ‘wss://public-api.wordpress.com/pinghub/wpcom/me/newest-note-data’ failed: Error during WebSocket handshake: Unexpected response code: 403
v @ ?v=2.0:6
_ @ ?v=2.0:6
o @ ?v=2.0:6
react-dom.min.713f0afa.js:104 Error: Minified React error #185; visit https://reactjs.org/docs/error-decoder.html?invariant=185 for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
at cb (react-dom.min.713f0afa.js:12)
at p (react-dom.min.713f0afa.js:13)
at Ca (react-dom.min.713f0afa.js:133)
at Object.enqueueForceUpdate (react-dom.min.713f0afa.js:192)
at t.q.forceUpdate (react.min.1b974caa.js:20)
at t.value (index.js?ver=1542772008:19)
at t.value (index.js?ver=1542772008:19)
at t.value (index.js?ver=1542772008:19)
at Rf (react-dom.min.713f0afa.js:105)
at Sf (react-dom.min.713f0afa.js:109)
Pf @ react-dom.min.713f0afa.js:104
Xf.f.function.f.componentDidCatch.c.callback @ react-dom.min.713f0afa.js:113
uf @ react-dom.min.713f0afa.js:65
tf @ react-dom.min.713f0afa.js:65
zc @ react-dom.min.713f0afa.js:146
wc @ react-dom.min.713f0afa.js:138
fa @ react-dom.min.713f0afa.js:137
gg @ react-dom.min.713f0afa.js:135
Ca @ react-dom.min.713f0afa.js:133
enqueueSetState @ react-dom.min.713f0afa.js:191
q.setState @ react.min.1b974caa.js:20
value @ index.js?ver=1542772008:1
(anonymous) @ index.js?ver=1542772008:1
n @ index.js?ver=1542772008:1
(anonymous) @ index.js?ver=1542772008:1
v @ index.js?ver=1542772008:1
(anonymous) @ index.js?ver=1542772008:1
(anonymous) @ index.js?ver=1542772008:1
value @ wp-seo-post-scraper-920.min.js?ver=9.2:1
value @ wp-seo-post-scraper-920.min.js?ver=9.2:1
n @ components-920.min.js?ver=9.2:1
h @ components-920.min.js?ver=9.2:1
p @ components-920.min.js?ver=9.2:1
2?v=2.0:6 WebSocket connection to ‘wss://public-api.wordpress.com/pinghub/wpcom/me/newest-note-data’ failed: Error during WebSocket handshake: Unexpected response code: 403
v @ ?v=2.0:6
_ @ ?v=2.0:6
o @ ?v=2.0:6
3?v=2.0:6 WebSocket connection to ‘wss://public-api.wordpress.com/pinghub/wpcom/me/newest-note-data’ failed: Error during WebSocket handshake: Unexpected response code: 403

Can you please help me to resolve?

Thanks,
Andy

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