Same problem here today drove me to this site and thread. After reading abt Roku devices perhaps not supported, and/or app(s) not supported by certain devices, I explored such on our 2 Rokus. Indeed, found our older device, Model 2710X (software ver 11.0.0, build 4195-06) will not load an updated BYUtv app (current app is ver 5.12, build 20220818). Additionally, "old" LDS Channel would not work today (so I deleted it and have no ver/build numbers to report here), and the replacement app (Gospel Stream) would not download and appear in the channel list. No cures were realized regardless of trials of deleting, updating (both apps and device), rebooting, unpowering/repowering using this older device.
However, the newer device (3930RW, Roku Express, sw 12.0.0, build 4184-AE) DOES play both of these apps now that they have been updated/downloaded by accessing my Roku acc't online. BYUtv is ver 5.61, build 20230923; Gospel Stream is ver 1.3, build 405. The bottom line: the app owners are now supplying versions which are incompatible w/ at least some models of Roku devices; welcome to the world of planned obsolescence. HTH, Robert