Chrome does not register to gcm anymore

Hey,

I am facing the issue that Chrome does not register to gcm for some time now, although it did before.

It seems to be related to an issue with the sender id.

Here is the related logcat output:

**GmsGcmRegisterSvc** 
onBind: Intent { act=com.google.android.c2dm.intent.REGISTER pkg=com.google.android.gms }

**GmsHttpFormClient** 
-- Request --
X-GOOG.USER_AID=3557875368816913745&device=3557875368816913745&app=com.android.chrome&appid=d-fambNGVew&cert=38918a453d07199354f8b19af05ec6562ced5788&app_ver=353811002&app_ver_name=70.0.3538.110&gmsv=13280000&scope=*&osv=27&sender=BDd3_hVL9fZi9Ybo2UUzA284WG5FZR30_95YeZJsiApwXKpNcF1rRPF3foIiBHXRdJI2Qhumhf6_LFTeZaNndIo&subtype=BDd3_hVL9fZi9Ybo2UUzA284WG5FZR30_95YeZJsiApwXKpNcF1rRPF3foIiBHXRdJI2Qhumhf6_LFTeZaNndIo

**GmsGcmRegisterMgr** 
java.io.IOException: Error=INVALID_SENDER
	at org.microg.gms.common.HttpFormClient.request(HttpFormClient.java:90)
	at org.microg.gms.common.HttpFormClient$1.run(HttpFormClient.java:187)
	at java.lang.Thread.run(Thread.java:764)

I get this result in all apps that try to register for web push notification, e.g.

https://gauntface.github.io/simple-push-demo/

This however works with Firefox, but sadly ff still misses several other features of web push...

Kind regards

Start with the logcat trace and inspect org.microg.gms.common.HttpFormClient.java, especially the request path around lines 90 and 187, then follow how GmsGcmRegisterMgr handles INVALID_SENDER. Reproduce the registration failure with the linked simple push demo and compare the sender data in the request; done means Chrome and other web-push apps register successfully.