Umbraco-cms: Saving a member causes page hanging

[elit0451]

When you add a member in the back-Office with the required information and save the changes, the second time the Save button is pressed the page will just start hanging.

Umbraco V7.14

Steps to reproduce

1 - Go to the Members section
2 - Under the Members tree select Member
3 - Create a member by filling in all the required fields
4 - Click Save
5 - Clicking the Save button again will make the page hanging

Expected result

Get a message that the member is saved - ex: "Member saved: Member saved" - as it happens for a Content item

Actual result

The Save button indicates hanging (loading circle appears) and the error Cannot read property 'reset' of null is caused in the MemberEditController

[kjac]

Turns out this is a bit more critical than initially reported; you can't save a member at all without resetting the member password! This applies to both V7 and V8.

PRs for fixing it in #5798 (V8) and #5799 (V7).

[nul800sebastiaan]

Thanks very much once again for all the help @kjac !