Global protect Android version 13 mobile users not connecting portal issue. The network connection is unreachable, or the portal is unresponsive issue

[Karuppu]

Hi Team,

Good day!

Global protect Android 13 version mobile users not connecting portal issue. Error shows "The network connection is unreachable, or the portal is unresponsive. Check the network connection and reconnect."

I have created self signed certificate and installed in the mobile but still same issue.following logs collected from Android mobile GP.log errors. 

Note:its working IOS users and Android 12, 11 ,10versions 

fingerprint=e2:f2:78:8a:de:bb:e7:54:c8:01:65:db:af:29:0f:c8:e5:5c:86:d7
(31135)01/25 14:20:49:44286 - checkServerTrusted: bVerifyServerCert true
(31135)01/25 14:20:49:44571 - checkServerTrusted: verify server cert now! certFilename=null, pass=xxx, revoke=true
(31135)01/25 14:20:49:44680 - verify it again CA file
(31135)01/25 14:20:49:46440 - checkServerTrustedAgainCAFile: TrustManager, size1
(31135)01/25 14:20:49:48474 - verified by system trusted credentials..
(31135)01/25 14:20:49:53441 - PanHttpsClient: 1738, found exception:javax.net.ssl.SSLHandshakeException: Read error: ssl=0xb400007ad65a5fc8: Failure in SSL library, usually a protocol error
error:1000012e:SSL routines:OPENSSL_internal:KEY_USAGE_BIT_INCORRECT (external/boringssl/src/ssl/ssl_cert.cc:605 0x7b5ae9511a:0x00000000)
(31135)01/25 14:20:49:53596 - PanHttpsClient: server cert error
(31135)01/25 14:20:49:53709 - (l6)JNI,31216,228,after JNIGetHttpResponse, ret=Valid(31135)01/21 14:20:49:53812 - (l5)JNI,31216,316,not handled, ret=error, javax.net.ssl.SSLHandshakeException: Read error: ssl=0xb400007ad65a5fc8: Failure in SSL library, usually a protocol error
error:1000012e:SSL routines:OPENSSL_internal:KEY_USAGE_BIT_INCORRECT (external/boringssl/src/ssl/ssl_cert.cc:605 0x7b5ae9511a:0x00000000), return NULL now
(31135)01/25 14:20:49:53908 - (l6)JNI,31216,7643,prelogin to portal result is
(null)
(31135)01/25 14:20:49:53955 - (l6)JNI,31216,7955,Failed to pre-login to the portal  Ip address (public ip XX.Xx.Xx ) with return value 0(0).
(31135)01/25 14:20:49:54016 - (l6)JNI,31216,571,DestroyHTTPSession(31135)01/21 14:20:49:54056 - (l5)JNI,31216,10661,Portal config does not exist, try registry/plist
(31135)01/25 14:20:49:54130 - (l5)JNI,31216,8829,failed to retrieve value of the tag version.
(31135)01/25 14:20:49:54169 - (l5)JNI,31216,8844,Skip reading cached portal config.
(31135)01/25 14:20:49:54228 - (l6)JNI,31216,12503,No scep profile
(31135)01/25 14:20:49:54267 - (l6)JNI,31216,8860,portal status is Invalid portal.

[NilsJGabrielsen]

This means that we need to create an child certificate under the parent one?  
Yes, create a mycompanyROOTCA, and a mycompanyGLOBALPROTECT cert.

Do we need to install both Parent and Child Certificate on the android device?
No need to install, it can be pushed when connection to GP portal.
Or you can install ROOTCA on the android if you like.