Mail compose windows doesn't close after "successful send"

[der-ada]

Summary:

The mail compose window doesn't close after sending an email, and a short message that the email was sent is displayed.

(The mail has also not been sent, but I am unsure if this is related.)

Steps to reproduce:

1. Go to admin -> Site Admin -> People and click on the little envelope. Compose a mail and send it.
2. A small popup appears "Message sent!"
3. The "Compose Message" window remains on the screen and doesn't even disappear when the page is reloaded.
4. No message is sent.

Expected behavior:

The "Compose Message" window should close after sending; the mail should be sent.

Actual behavior:

As described.

Additional notes:

I don't know whether the fact that the message is not sent relates to the window not closing.

[knaito-asial]

I think this issue is resolved by the commit

https://github.com/instructure/canvas-lms/commit/66eb993ed6d3511ead211e39b0a7846935d5e04e

which enables react-inbox.

Or check the config/feature_flags/vice_release_flags.yml file. if there is a

react_inbox:
  state: hidden
  ...

, you can try to use react-inbox by changing state as

react_inbox:
  state: on
  ...