Maybe I can help - at least share my experience as I got mine a few days ago. It took me about 15 minutes or so to understand what is needed to be done, but after that I figured the iffy instructions out. Here's what I did:
1. Ensure phone is connected to home WiFi using the 2.4Ghz band
2. Plug in the light, and press R button and don't let go until you see it BLUE. It'll cycle to flashing red then eventually flash to blue - once you see that then you can let go. It is now in LAN mode. The instructions says to let go of the R button when the red stops flashing....I didn't let go until I saw blue instead.
3. Proceed to step 2 and 3 of the instructions.
I did the above after trying to follow the instructions on the sheet of paper, but eventually figured out the 3 steps I noted down worked like a charm.
I initially set it up with AP mode, but that wasn't ideal for me as then I'd have to keep on switching off my WiFi on the phone to connect to the light directly.
Hope this helps? Not sure what challenges you're experiencing, but feel free to reach back out. I think the key is ensuring the light is in LAN mode - the instructions aren't good in communicating how to do that.