This TP-Link Nano AC600 USB Wifi Adapter (Amazon link) has never failed me. Used it with rg351p, rg351mp, and rgb10 (and lots of PCs). Some other WiFi dongles I've had worked great, but just came apart after inserting and removing them several times. This one is solid and uses more robust materials than those others.
Ended up tossing in a USB-based WIFI adapter to get 5Ghz... The TP-Link Nano AC600 worked perfectly (https://www.amazon.com/gp/product/B07PB1X4CN) and was only about $15...