My Server Found more My Map Not Found!

[crashangelbr]

Hi, I Rebuild this project in 4.26 and When I Create Server OK
Before I Found Server in Other Windows and receive this mesage:
- LogJson: Warning: Field heartbeat was not found.
- LogJson: Error: Json Value of type 'Null' used as a 'Number'.

Could you tell me if I need to configure the map somewhere?

[tads421]

could you upload the 4.26 version? I am unable to compile it because of errors and I don't know C++ enough to fix it.