Hi @Chad,
Check this thread which explains why Radzen.Blazor 6.x.x exists as major version with breaking changes: Just released our new major version of Radzen.Blazor 6.0.0 without reference to System.Linq.Dynamic.Core NuGet package
In short breaking changes are likely and we are doing our best to fix them. As @enchev said you can either stay on 5.x.x which works for you or at least provide some code. Repeating "ALL my grids don't work" does not help.