Replication from Domain child and domain parent not works

Hello ,

Please should be informed that i have implemented a domain child Windows server 2016 which join to domain 2008 R2 everything is fine ,however the replication between site A "Windows 2008 R2 Root domain" and site B "Windows 2016  domain child" not working when i try to force the replication by replicate now i got errors below  , i put two firewall between server ping workis perfectly  LDAP DNS and other ports are allowed through firewalls "wagtcguard and fortigate"

can you please help me ?

it is an Enviremenet lab