Hi Saglietto,
Thanks for contacting Syncfusion Support.
Please refer to the following link to migrate from Syncfusion older version to a newer version,
We created a web application and migrated from the older version to 14.1.0.41, but, we were unable to reproduce the issue at our end. Please try the steps given in the above link and even after that if you face the same issue, share the following details.
1) Do you face any error in the web page or script errors while rendering the control?
2) Please ensure that with your application the DLL version is properly migrated in web.config and ASPX file and the corresponding assembly version is properly referred in your application.
3) If you are facing the issue “$(..) ejAutocomplete not a function” in script , please check the following KB link to resolve this issue
4) Share your web.config and sample code along with error details, if any, so that we can look into the issue further and provide an appropriate solution.
Regards,
Selvamani S