I can't load my pokemon y states

I can’t load my pokemon saves y loading the game by state.
I had not saved directly through the game.

ERROR: unregistered class

I saw in the community that a guy had the same problem as me and someone helped him and I followed the steps that said to install the older version of Citra but it still doesn’t load. I installed the 1884, also the 1894 and it was not.

Can someone help me?

System Information

Diagnostic Log
Upload your log file as an attachment by dragging & dropping.
citra_log.txt (133.0 KB)

In order to save a copy of the log, follow this guide:

Save states save the entirety of Citra’s emulation state, and as a result, new Citra updates that add new things to serialize in the emulation state will break the loading of save states that were created on prior Citra versions. Additionally, saving upon save state created progress will make the emulation state gradually more unstable. Since the emulation state never gets to clear out emulation bugs with a proper shut down. This is why in-game save files should be used most of all when saving and loading your progress. Save states should only be used within single gaming sessions, not beyond them.

With that out of the way, what save state slot are you trying to load? If I know that, I may be able to find the Citra build that you can use to load your old save state.