Missing worker policy when launching assistant

[smarinier]

Which version of assistant are you using?

2.1.0

Which version of Nextcloud are you using?

30.0.0

Which browser are you using? In case you are using the phone App, specify the Android or iOS version and device please.

Chrome 128.0.6613.114

Describe the Bug

Launch the assistant:

ScheduledEmptyConten…KXdH-J.chunk.mjs:33 Uncaught (in promise) SecurityError: Failed to construct 'Worker': Access to the script at 'blob:

Note: This looks like a cross application policy trouble (hidden by a classical use of other application). See nextcloud/server#39849

Expected Behavior

Launch the assistant

To Reproduce

A NextCloud 30 without any application modifying the policy in a convenient way for Assistant (eg Talk). (A minimal Nextcloud)