POPrince Oliver Syncfusion Team April 4, 2019 02:12 AM
Thank you for contacting us.
Based on the shared information, we suspect that the issue might have occurred due to missing assemblies for classic products in your end. In the newer versions, we have moved the classic products to separate setups and no longer included in Essential studio setup. So, the assemblies might not be available, if you have installed the Essential studio. We suggest you check this by installing the individual setups for Classic products that you are using. Please download the setup for the version in the following table.
Kindly let us whether the above suggestion resolved the issue in your end. If not, please shared more information on this issue along with screenshots and details on your environment. This will help us provide a prompt solution.