Simulation: AXC F 1152 does not connect/ not found to UA Expert

Hello! I and my friends got a project to do where we have to connect PLCnext Engineer to UA Expert and Factory IO. When we try to connect it we can’t find the server. I have tried all the options and the server cannot be accessed or is not found. Pls help we!

Do you mean you are connecting a PLCnext Engineer project running in a physical AXC F 1152 to UaExpert and Factory IO? Or, are you connecting an AXC F 1152 Simulator to UaExpert and Factory IO?
If you are using the AXC F 1152 simulator, is that running on the same PC as UaExpert?
If not, then what is the IP address of:
(a) the PC running UaExpert, and
(b) the AXC F 1152 ?
In UaExpert, what URL are you using to connect to the OPC UA Server in the AXC F 1152 ?
Are you able to connect UaExpert to other OPC UA Servers, e.g. one of the free OPC UA servers listed here?

Thanks for the replay! I solved the problem, it was from the old version of the UA Expert program(1.2). I changed to 1.6.3 and work!