Android google play login fails(show external login UI)

Hey everyone,
My game fails to login using the blueprint “show external login ui”. It will ask for permission, show the logos and the green loading circle will appear, then it fails. Unfortunately my log info does not provide much in the way of help. Just:
LogOnline:Warning: Async task ‘ShowLoginUI’ failed in 7.290195 seconds

Here is some more from the log:

01-19 10:02:48.689: D/UE4(15118): [2016.01.19-18.02.48:689][ 0]LogStats:Warning: MetaData mismatch. Did you assign a stat to two groups? New //STATGROUP_Threads//UdpMessageUnicastReceiver///Thread_3c2f_0///####STATCAT_Advanced#### old //STATGROUP_Threads//UdpMessageUnicastReceiver///Thread_3b45_0///####STATCAT_Advanced####
01-19 10:02:48.692: D/UE4(15118): [2016.01.19-18.02.48:689][ 0]LogAndroid: Case APP_CMD_GAINED_FOCUS
01-19 10:02:48.694: D/UE4(15118): [2016.01.19-18.02.48:693][ 0]LogAndroidEvents:Display: DequeueAppEvent : 11, 0
01-19 10:02:51.821: D/UE4(15118): [2016.01.19-18.02.51:821][64000]LogOnline:Warning: Async task ‘ShowLoginUI’ failed in 7.290195 seconds
01-19 10:02:51.830: D/UE4(15118): [2016.01.19-18.02.51:830][64000]LogBlueprintUserMessages: [MyGameInstance_C_0] Login Fail

I was finally able to login! Here is the page that helped me debug the issue: Troubleshooting Issues in Your Android Game

Any specifics on what the cause was? I’m having the same problem, and that page has a loooooot of irrelevant stuff to wade through.

Seconded. I’m just as lost.

I was having a similar problem : Login was always failing.

What solved it for me was (i do a full BP game) :

For information, i could finally login approximatively 1 hour after i finished this checklist.

Hope this helps !

I write a firebase plugin on github, support both google, facebook and twitter login.
https://github.com/feixuwu/UEFireBase

My game used to able to log in with external login ui node, but now I see only loading sign a bit but always false from log in. I got several email from google firebase that Firebase bucket expired. I changed the rule to public and delay the date, still can’t login to google play service when roll out in internal test.
I’m banging my head with wall. Anyone please help guide me or give some tips?