I think I have the same problem. I am connected to web UI but it looks like WIFI-BOARD can not connect to Printer_Board.
I can not control my printer, webUI shows that printers is not connected. It is the same in Cura where it connects plugin to wifi board but it says printer is not connected.
I think that there might be some problem with comunication WIFI >>> PRINTER
I use MARLIN on my printer and I enabled serial port but I dont know what speed / baudrate should I set for this serial port …
#define SERIAL_PORT_2 1
//#define BAUDRATE_2 250000 // :[2400, 9600, 19200, 38400, 57600, 115200, 250000, 500000, 1000000] Enable to override BAUDRATE