Hi Sylvian,
Thanks for contacting Syncfusion support.
We suspect that, the problem may have occurred due to referring improper ej.interop.min.js file or incompatible version script files(ej2.min.js and ej.interop.min.js). So we suggest you to ensure whether the referred file is downloaded by inspecting it in the Browser network tab and refer the same version scripts(ej2.min.js and ej.interop.min.js) and styles(material.css). We have prepared a sample referring the same version(17.4.0.50) scripts and styles. Please download the sample from the link below,
If you still face the problem, then we suggest you to share the details regarding how you have downloaded the files. And also try using the below way to download the files.
In the above sample, we have used the local script files downloaded from our latest version(17.4.0.50) cdn links. To download scripts and styles, you can just go to the corresponding cdn link, and click the “Save as” option. Please find the screenshot below,
Please get back to us if you need further assistance.
Regards,
Renjith Singh Rajendran.