Aggregate Error: sort order <sort order> and cached sort order <sort order> mismatch.
You changed the session sort order. The new sort order is not compatible with the previous code page sort order. Therefore, the data in the existing aggregate cache is not compatible with the new session code page.
If you want to reuse the data in the cache, set the sort order of the current session to a compatible code page sort order. Otherwise, reinitialize the cache or manually delete the cache file.