The Weather Screensaver stopped showing current weather, 5 day forecast, etc. I have checked for Roku software updates and rebooted the device. Info in the bottom right corner has 'last updated n/a' Temp is set to 32 and about 55 outside. I have changed the locations and all are the same.
Last posting here was in 2019 so may be a defunct Screensaver (maybe no longer actively developed). I think your best course of action would be to seek a refund through Roku through their Contact Us - Billing option.