Error message when trying to create or edit a post

In full disclosure, I haven’t put up a new post to my blog in 10 months, but today I tried to add a new post and I kept getting an error message. Here are the error details:

TypeError: Class constructor m cannot be invoked without 'new'
    at new t (https://neitherheightnordepth.com/wp-content/plugins/amp/assets/js/amp-block-editor.js?ver=1.2.0:11:1505)
    at Yg (https://c0.wp.com/c/5.8.1/wp-includes/js/dist/vendor/react-dom.min.js:68:243)
    at rh (https://c0.wp.com/c/5.8.1/wp-includes/js/dist/vendor/react-dom.min.js:98:274)
    at zj (https://c0.wp.com/c/5.8.1/wp-includes/js/dist/vendor/react-dom.min.js:228:490)
    at Th (https://c0.wp.com/c/5.8.1/wp-includes/js/dist/vendor/react-dom.min.js:152:223)
    at tj (https://c0.wp.com/c/5.8.1/wp-includes/js/dist/vendor/react-dom.min.js:152:152)
    at Te (https://c0.wp.com/c/5.8.1/wp-includes/js/dist/vendor/react-dom.min.js:146:151)
    at https://c0.wp.com/c/5.8.1/wp-includes/js/dist/vendor/react-dom.min.js:61:68
    at unstable_runWithPriority (https://c0.wp.com/c/5.8.1/wp-includes/js/dist/vendor/react.min.js:25:260)
    at Da (https://c0.wp.com/c/5.8.1/wp-includes/js/dist/vendor/react-dom.min.js:60:280)

Any ideas what’s causing this or how to fix it?