I'm really sorry to hear some of you having a problems with the UD 701N network module. I have mine for about a month and I've never experienced any problem related to the network or anything else. I'm using it on a daily basis mostly Tidal connect streaming from my android phone, sometimes Roon RAAT (still deciding weather I should by lifetime subscription) and Internet Radio.
I've come up to threads regardless of the device that some users experience problems when using tidal connect from Windows application (the device didn't appear as endpoint). Is this maybe your case?
I'm really impressed by the TEAC UD 701N DAC module. It sounds so organic in both multi bit PCM and 1 bit DSD. It have terrific resolution and clarity. Definitely game changer