My mx anywhere 3 was working with dongle yesterday. Please tell how to make the dongle work...

My mx anywhere 3 was working with the dongle yesterday. Today I start playing and all of a sudden the dongle doesn't work but the Bluetooth works. Please tell how to make the dongle work again. I was using it with the Xbox. I also tested with other devices and the Bluetooth worked but the dongle didn't l. Please tell me how to fix.

:)