using control PersistentSearch/Autocomplete or more control in xaml show error (value cannot be null. (parameter 'property')), in wpf .net6.0,

[LaiHT1211]

I think the problem is that the version of "MaterialDesignThemes.Wpf" used by "MaterialDesignExtensions" is inconsistent. How should I solve the problem of compatible versions? Thank you

[LaiHT1211]

Additional Notes
Current Environment

[LaiHT1211]

The right scenario in wpf .net6.0