wifimgr shows a popup containing an error and it crashes.
cannot reset interface wlan0 - exit code 1
See as reference:
This is not a bug in wifimgr, all wifimgr is doing is reporting an error from the underlying rc script. You are probably hitting the problem noted in PR 183407 that has long been awaiting a fix.
(In reply to fbsd from comment #1)
Oh, in this case the bug 183407 must be resolved to close this one.
Maintainer has responded. Please remember the proper way to flag maintainer response is to set it to (+), not to remove it.
close as per request.