Receiver does not connect to remote

hey, i have a question and hope someone can help me. I am currently building an e surf board and am now assembling all the components. unfortunately I have a little problem with my “maytech remote”! it does not establish a connection to the receiver, which is connected to a ztw 300A OPTO HV 14S. the receiver flashes, so it gets power but when I press Paring in the remote nothing happens. Could someone please help me there???

@Eileen_Lu_Maytech please help …

the ESC doesn’t have 5V power supply for receiver. Please supply 5V power to the receiver and then it will work.