error in jenkins master and slave configuration

Question

I was able to login from my master to slave server through SSH, but while setting up slave node in jenkins UI. It has the following error. please give me solution enter image description here

Answer 1

The error message states

No entry currently exists in the Known Hosts file for this host. Connections will be denied until this new host and its associated key is added to the Known Hosts file.

Check your agent configuration for "Host Key Verification Strategy", most likely you have "Known hosts file verification strategy".