Hi Scott,
Thank you for contacting Syncfusion support.
Based on your provided details, we suspect that the cause of the reported issue is due to the installation of duplicate packages in your application. In general, duplicate package will be installed when there is any version mismatch between the packages. Please follow the steps specified in below UG documentation to resolve this issue in your end.
Also, we would like to inform you that if the entry for the Syncfusion package with different version then it will lead to install the duplicate in your application. For example, if the “ej2-angular-dropdowns” package having the version with “18.*.*” and other Syncfusion package having the version with “17.*.*” or different version against dropdown package version will leads to the reported console error. So please use same package version for Syncfusion components in your application. We have prepared sample below for reference, please find below.
Could you please run the sample after updating package as specified in the above documentation and get back to us with more information if you still face the issue or need any further assistance on this?
Regards,
Ponmani M