Peer to Peer Replication is not working between 2 different machines

Hi,

I am using SQL 2019 server,

updates in server a and b from machine 2

reflects in all 4 servers a and b in machine 1 and c and d in machine 2

but updates in c or d is updating only in that server

in replication monitor of Machine 2 , only server in machine 2 is showing error

Agent 'abc\MSSQLSERVER-AdventureWorksLT2019-2' is retrying after an error. 2 retries attempted. See agent job history in the Jobs folder for more details.

can anyone help me to fix this

Thank You