EW: "Some of your messages have not been sent" is broken

[kegsay]

the Delete all button does nothing and i have stack traces like:

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'shouldAttemptDecryption')
    at MatrixClient.decryptEventIfNeeded (init.js:20096:15)
    at element-web-app.js:24996:14
    at Array.forEach (<anonymous>)
    at TimelinePanel_TimelinePanel.getEvents (element-web-app.js:24994:64)
    at TimelinePanel_TimelinePanel.reloadEvents (element-web-app.js:24977:24)
    at MatrixClient.<anonymous> (element-web-app.js:24235:12)
    at MatrixClient.emit (vendors~init.js:666:7)
    at MatrixClient.emit (init.js:30733:18)
    at Room.forSource (init.js:65853:22)
    at Room.emit (vendors~init.js:666:7)
decryptEventIfNeeded @ init.js:20096
(anonymous) @ element-web-app.js:24996
getEvents @ element-web-app.js:24994
reloadEvents @ element-web-app.js:24977
(anonymous) @ element-web-app.js:24235
emit @ vendors~init.js:666
emit @ init.js:30733
forSource @ init.js:65853
emit @ vendors~init.js:666
emit @ init.js:30733
addPendingEvent @ init.js:11855
sendCompleteEvent @ init.js:17337