The following screenshot displays the error.
Figure 1: Error message
In order to avoid the Accordion does not exist issue, refer to the Syncfusion.EJ.Web assembly in the project. The following assembly information table helps you choose the correct assembly version.
Table 1: DLL Reference
Refer to the corresponding assemblies for adding the Syncfusion ASP.NET controls in the web applications as given in the following link:
In order to render the controls, you have to add the required script files and CSS files in your application. You can follow the steps given in the UG documentation link as follows:
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