piCorePlayer 5.0 and wifi not connection to NAS

I am new to piCorePlayer after my squeezebox is dead. I am manage to setup a RPI 3 B+ with 7" touchscreen. The installation went smoothly. I can access my Synology NAS with ethernet connection. When I disconnect the Ethernet cable and using the wifi.

The piCoreplayer cannot access the NAS, but I can access to the piCorePlayer setting with wifi IP address. Is there anything I can troubleshooting?

Thanks