Bug: Unable to add Integration / Bridge for Slack

Can't add Slack integration:
(error from scalar:
"Please enable popups to auth with Slack.")
.
this is _not_ a user error,
nor anything that a user can fix.
.
This happens when a user uses the Element for Android app (tested, latest stable release, 1.0.5)
due to
the Element app's builtin (sandboxed) web-browser-instance.

SEE ALSO
literally -- this exact /same bug/
in Riot
Was confirmed //and fixed//
back in December 2018
:
https://github.com/vector-im/riot-android/issues/2768

[Bug carryover from Riot??
Was fixed in Riot, issue# 2768 ... Yet still exists here in Element.]

Tested & confirmed bug exists on:

* Element for Android 1.0.5