1. Go to Storage.
2. Click on Manage Devices of a Pool.
3. Select the RAIDZ3
4. Click on Extend.
The screen become darker, but noting shows up.

Browser Console:
TypeError: o is undefined
e raidz-extend-dialog.component.ts:90
setFilterMinimumSizeFn raidz-extend-dialog.component.ts:88
pe raidz-extend-dialog.component.ts:54
fac raidz-extend-dialog.component.ts:94
Angular 10
onRaidzExtend zfs-info-card.component.ts:214
So zfs-info-card.component.html:68
Angular 3
t helpers.js:75
Angular 15
_wrapEventTarget trycatch.js:114
Sje instrument.js:376
Angular 6
So zfs-info-card.component.html:68
Angular 5
set ixHasAccess has-access.directive.ts:28
set ixRequiresRoles/< requires-roles.directive.ts:34
RxJS 42
set ixRequiresRoles requires-roles.directive.ts:34
Angular 5
Io zfs-info-card.component.html:68
Angular 28
instrument.js:114:35

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://sentry.ixsystems.com/api/4/store/?sentry_key=___&sentry_version=7. (Reason: CORS request did not succeed). Status code: (null).

Session ID: 0f65cbc7-99e7-1c91-5e3a-d520617a6152