"Leave this group" button not working

Summary

"Leave this group" button is not working

Steps to reproduce

I don't have the steps to reproduce the failing configuration. But you can contact me to have a look to one of the groups where it occurs: https://gitlab.com/groups/dalenys/protected/cicd

On google chrome, when I click on "Leave this group" button, nothing happens, just an error in the console One thing is also surprising is that I don't see my user as a direct member of the group on which the error occurs. But I see my user as member of the group when I list the group-members with the cli: https://python-gitlab.readthedocs.io/en/stable/cli-objects.html?highlight=subgroup#gitlab-group-member

gitlab -o json group-member list --group-id "${1}" | json_pp | jq '.[] | "\(.username) \(.access_level)"'

What is the current bug behavior?

The button is not working

What is the expected correct behavior?

The button should remove my user from the group

Relevant logs and/or screenshots

same here:

In the google chrome console:

instrument.js:109 TypeError: Cannot set property 'isBeingRemoved' of null
    at a.leaveGroup (app.vue:192)
    at zt (vue.esm.js:1863)
    at a.n (vue.esm.js:2188)
    at zt (vue.esm.js:1863)
    at a.t.$emit (vue.esm.js:3897)
    at a.primary (modal.js:132)
    at zt (vue.esm.js:1863)
    at a.n (vue.esm.js:2188)
    at zt (vue.esm.js:1863)
    at a.t.$emit (vue.esm.js:3897)
    at a.hide (modal.js:526)
    at a.onOk (modal.js:727)
    at a.ok (modal.js:123)
    at zt (vue.esm.js:1863)
    at n (vue.esm.js:2188)
    at zt (vue.esm.js:1863)
    at HTMLButtonElement.n (vue.esm.js:2184)
    at HTMLButtonElement.i._wrapper (vue.esm.js:7565)
    at HTMLButtonElement.r (helpers.js:72)
(anonymous)	@	instrument.js:109
Wt	@	vue.esm.js:1897
Vt	@	vue.esm.js:1888
qt	@	vue.esm.js:1848
zt	@	vue.esm.js:1871
n	@	vue.esm.js:2188
zt	@	vue.esm.js:1863
t.$emit	@	vue.esm.js:3897
primary	@	modal.js:132
zt	@	vue.esm.js:1863
n	@	vue.esm.js:2188
zt	@	vue.esm.js:1863
t.$emit	@	vue.esm.js:3897
hide	@	modal.js:526
onOk	@	modal.js:727
ok	@	modal.js:123
zt	@	vue.esm.js:1863
n	@	vue.esm.js:2188
zt	@	vue.esm.js:1863
n	@	vue.esm.js:2184
i._wrapper	@	vue.esm.js:7565
r	@	helpers.js:72

Output of checks

This bug happens on GitLab.com

Results of GitLab application Check

Implementation plan

1. Pass action prop to app/assets/javascripts/groups/components/item_actions.vue#L24 in app/assets/javascripts/groups/components/group_item.vue#L184
2. Write unit test in spec/frontend/groups/components/group_item_spec.js#L24 to ensure action prop is being passed correctly