Hi Patrick,
Thanks for contacting Syncfusion support.
The application bin folder contains the Syncfusion assemblies v16.1. The converted Syncfusion v16.2.0.41 assemblies are referred from GAC without copy local true. So, the application referred assemblies from bin folder.
Could you please make copy local as true for all the Syncfusion assemblies which referred in application to resolve the issue? We will make the changes and it will be included in any one of our upcoming release.
Regards,
Kannan