After power cycling the modem, all devices wouldn’t connect. After 1 tech call, I went to the store and swapped the modem. When I got back, even after setting up the new WiFi, there was still no internet connection on any device, plus my landline was down. Long story short: it ended up being a faulty cable from the outside box to the router, but even after that, the Roku couldn’t receive a strong enough signal despite my (and the tech’s) phone showing a very strong signal in the same room. So I replaced the stick with a box and all good since.
