CCP not support under IOS-XE  IOS-XE support WebUI   

Yes we are able to ping router on management port.please find below configuration. R2#sh runBuilding configuration...Current configuration : 11132 bytes!! Last configuration change at 11:45:42 UTC Sat Sep 28 2019!version 16.9service timestamps debug ...

I have same issue on my cisco ISR4431/K9 i already configured ip http server, ip http secure-server but still i get 404 page not found error.if you have any solution please share.

Spoiler  have you found any solution for for above scenario.

have you tested same configuration