Scrivener Toolbar Locked

I can’t presently customise my main toolbar. The toolbar editor doesn’t let me drag any of the icons on the toolbar. Moreover, the toolbar editor only shows me the default toolbar even when I am using customised toolbar. I reinstalled the Scrivener but it didn’t help.

Any suggestions? I haven’t had this problem before.

EDIT:

MacBook Air i5 2020 + BigSur 11.2.3 + Mac Scrivener 3.2.2

I’d try-

Check after each step–
Reboot computer.

If the issue is happening in one project, from L&L:
scrivener.tenderapp.com/help/kb … y-settings

If still happening after above or if in multiple projects, from L&L:
scrivener.tenderapp.com/help/kb … references

I resetted the Scrivener preferences. It helped and now it works as before.

Thanks!