Currently, Guides 901.x is not compatible with the Guides 800 solution, as indicated in the following public information:

https://learn.microsoft.com/en-us/dynamics365/mixed-reality/guides/new#december-20-2023

If the Guides solution and the app running on Hololens become incompatible with each version upgrade, it will be difficult to operate, so please consider making it possible to use different versions.