startup failure: sandbox helper error (rc0 & rc1)

[steckerhalter]

./emoji-keyboard-3.0.0-rc0.AppImage
[16018:0317/093152.361600:FATAL:setuid_sandbox_host.cc(157)] The SUID sandbox helper binary was found, but is not configured correctly. Rather than run without sandboxing I'm aborting now. You need to make sure that /tmp/.mount_emoji-iEHbBB/chrome-sandbox is owned by root and has mode 4755.
Trace/breakpoint trap
./emoji-keyboard-3.0.0-rc1.AppImage
[16048:0317/093158.235476:FATAL:setuid_sandbox_host.cc(157)] The SUID sandbox helper binary was found, but is not configured correctly. Rather than run without sandboxing I'm aborting now. You need to make sure that /tmp/.mount_emoji-7j7qau/chrome-sandbox is owned by root and has mode 4755.
Trace/breakpoint trap

System: Debian 9

[twinklebob]

Could this be related to same root cause as #54?

[steckerhalter]

@twinklebob the messages look quite different but I don't know

[drazisil]

Believe this will help electron/electron#17972

[OzymandiasTheGreat]

Sorry for the late reply, been out with flu for almost 2 months now.
First, many thanks @drazisil ! This saves me a lot of time.
Anyway, this doesn't look like anything I can fix on my side, gotta wait for fixes upstream.
I probably should add a note in the readme tho.

[drazisil]

Glad you are feeling better, @OzymandiasTheGreat