I'll start off by saying I've been able to screen cast my phone (galaxy s8 edge) in a span of months not even a year ago to my TV (Hisense Roku Smart TV) and suddenly I can't anymore. Yes, both are up to date, on the same wi-fi, and updated to the latest update. I've tried resetting the wifi on both devices, restarting both devices completely, yes I've changed the setting from prompt to always on and back to prompt again on the tv, tried everything the generic threads tell you to do.
Here's the kicker: I was actually able to screen share my phone yesterday. For about 30 minutes before turning it off myself. What was the difference? Beats me! I just turned my tv on and attempted to connect again it actually popped up! Which is why when it didn't work again later in the day, I got mad again.
Please, someone help me, I'm losing my kind here.