"Application error: a client-side exception has occurred (see the browser console for more information)."

[pennstatephil]

The page tries to load, then falls over with this error.
Console shows:

framework-4556c45dd113b893.js:1 TypeError: Cannot read properties of undefined (reading 'date')
    at C (index-ab0934645e80488c.js:1:37657)
    at Eo (framework-4556c45dd113b893.js:1:63192)
    at xi (framework-4556c45dd113b893.js:1:120432)
    at bs (framework-4556c45dd113b893.js:1:109368)
    at gs (framework-4556c45dd113b893.js:1:109296)
    at vs (framework-4556c45dd113b893.js:1:109159)
    at as (framework-4556c45dd113b893.js:1:105939)
    at ls (framework-4556c45dd113b893.js:1:104490)
    at S (framework-4556c45dd113b893.js:1:138450)
    at MessagePort.T (framework-4556c45dd113b893.js:1:138984)
du @ framework-4556c45dd113b893.js:1
main-a7929bce73e6df56.js:1 TypeError: Cannot read properties of undefined (reading 'date')
    at C (index-ab0934645e80488c.js:1:37657)
    at Eo (framework-4556c45dd113b893.js:1:63192)
    at xi (framework-4556c45dd113b893.js:1:120432)
    at bs (framework-4556c45dd113b893.js:1:109368)
    at gs (framework-4556c45dd113b893.js:1:109296)
    at vs (framework-4556c45dd113b893.js:1:109159)
    at as (framework-4556c45dd113b893.js:1:105939)
    at ls (framework-4556c45dd113b893.js:1:104490)
    at S (framework-4556c45dd113b893.js:1:138450)
    at MessagePort.T (framework-4556c45dd113b893.js:1:138984)
ee @ main-a7929bce73e6df56.js:1
main-a7929bce73e6df56.js:1 A client-side exception has occurred, see here for more info: https://nextjs.org/docs/messages/client-side-exception-occurred
ee @ main-a7929bce73e6df56.js:1
framework-4556c45dd113b893.js:1 Uncaught Error: Minified React error #423; visit https://reactjs.org/docs/error-decoder.html?invariant=423 for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
    at xi (framework-4556c45dd113b893.js:1:121812)
    at bs (framework-4556c45dd113b893.js:1:109368)
    at gs (framework-4556c45dd113b893.js:1:109296)
    at vs (framework-4556c45dd113b893.js:1:109159)
    at as (framework-4556c45dd113b893.js:1:105939)
    at ls (framework-4556c45dd113b893.js:1:104490)
    at S (framework-4556c45dd113b893.js:1:138450)
    at MessagePort.T (framework-4556c45dd113b893.js:1:138984)