Trello's Slack Alert dialog is goes blank

[Robert B_ Hanviriyapunt]

I'm getting the following error in the browser console when selecting a channel in the Slack Alert setup dialog:

jquery.js:4334 Error while parsing the 'sandbox' attribute: 'allow-storage-access-by-user-activation' is an invalid sandbox flag.
ie @ jquery.js:4334
je @ jquery.js:5232
append @ jquery.js:5425
renderOnce @ plugin-chrome-view.js:74
i.render @ view.js:87
open @ plugin-modal.js:87
modal @ plugin-handlers.js:750
(anonymous) @ plugin-handlers.js:166
(anonymous) @ index.esm.js:176
c @ bluebird.js:4594
t.attempt.t.try @ bluebird.js:2034
value @ index.esm.js:171
value @ index.esm.js:108
(anonymous) @ index.esm.js:119
value @ index.esm.js:118
listener @ index.esm.js:139
onloadwff.js:71 Failure with checking formfill: TypeError: Cannot read properties of null (reading 'aid') ln: undefined
dsn.ts:12 [Violation] 'setTimeout' handler took 52ms
2onloadwff.js:71 Failure with checking formfill: TypeError: Cannot read properties of null (reading 'aid') ln: undefined
instrument.ts:129 ReferenceError: MenuPlacer is not defined
at Object.M (extends.js:16)
at r.value (Select-dbb12e54.esm.js:2503)
at r.value (Select-dbb12e54.esm.js:2648)
at Jo (react-dom.production.min.js:181)
at Xo (react-dom.production.min.js:180)
at Ml (react-dom.production.min.js:261)
at ks (react-dom.production.min.js:230)
at bs (react-dom.production.min.js:229)
at ds (react-dom.production.min.js:223)
at react-dom.production.min.js:121
at i.register.e.exports.unstable_runWithPriority (scheduler.production.min.js:18)
at Ka (react-dom.production.min.js:120)
at Xa (react-dom.production.min.js:121)
at qa (react-dom.production.min.js:120)
at le (react-dom.production.min.js:285)
at On (react-dom.production.min.js:82)
at HTMLDocument.o (helpers.ts:87)
(anonymous) @ instrument.ts:129
ml @ react-dom.production.min.js:196
Cl.n.callback @ react-dom.production.min.js:210
_i @ react-dom.production.min.js:131
xi @ react-dom.production.min.js:131
Es @ react-dom.production.min.js:252
i.register.e.exports.unstable_runWithPriority @ scheduler.production.min.js:18
Ka @ react-dom.production.min.js:120
Ss @ react-dom.production.min.js:244
ds @ react-dom.production.min.js:223
(anonymous) @ react-dom.production.min.js:121
i.register.e.exports.unstable_runWithPriority @ scheduler.production.min.js:18
Ka @ react-dom.production.min.js:120
Xa @ react-dom.production.min.js:121
qa @ react-dom.production.min.js:120
le @ react-dom.production.min.js:285
On @ react-dom.production.min.js:82
o @ helpers.ts:87
helpers.ts:88 Uncaught ReferenceError: MenuPlacer is not defined
at Object.M (extends.js:16)
at r.value (Select-dbb12e54.esm.js:2503)
at r.value (Select-dbb12e54.esm.js:2648)
at Jo (react-dom.production.min.js:181)
at Xo (react-dom.production.min.js:180)
at Ml (react-dom.production.min.js:261)
at ks (react-dom.production.min.js:230)
at bs (react-dom.production.min.js:229)
at ds (react-dom.production.min.js:223)
at react-dom.production.min.js:121
at i.register.e.exports.unstable_runWithPriority (scheduler.production.min.js:18)
at Ka (react-dom.production.min.js:120)
at Xa (react-dom.production.min.js:121)
at qa (react-dom.production.min.js:120)
at le (react-dom.production.min.js:285)
at On (react-dom.production.min.js:82)
at HTMLDocument.o (helpers.ts:87)
(anonymous) @ extends.js:16
value @ Select-dbb12e54.esm.js:2503
value @ Select-dbb12e54.esm.js:2648
Jo @ react-dom.production.min.js:181
Xo @ react-dom.production.min.js:180
Ml @ react-dom.production.min.js:261
ks @ react-dom.production.min.js:230
bs @ react-dom.production.min.js:229
ds @ react-dom.production.min.js:223
(anonymous) @ react-dom.production.min.js:121
i.register.e.exports.unstable_runWithPriority @ scheduler.production.min.js:18
Ka @ react-dom.production.min.js:120
Xa @ react-dom.production.min.js:121
qa @ react-dom.production.min.js:120
le @ react-dom.production.min.js:285
On @ react-dom.production.min.js:82
o @ helpers.ts:87
onloadwff.js:71 Failure with checking formfill: TypeError: Cannot read properties of null (reading 'aid') ln: undefined

[Kevin Trowbridge]

I have the same problem! Thanks