issue when upgrade Kentico 10 to 11

Roll your upgrade back to your v10 instance and DO NOT run the API change process. Run the upgrade via the KIM then open the upgraded project in Visual Studio and build the project. Resolve your errors from there.

Most likely the API Change program caused some problems. Doing upgrades for the last 9 years, we've found it's easiest to resolve the issues you have with your custom code after you've ran the upgrade procedure vs. using the tool Kentico provides.

Thank for Feedback.

But I had been retrying to Install Upgarde without API Change and build my project.
It still show the same error like topic post. Can you help me please.

After installing the upgrade check your project referencies, Lib and Bin folders if they contain CMS.* libraries of 10 version. If so just delete these referencies / libraries. This should help.

Adding those dependent assemblies is NOT necessary and will only cause further problems down the road. You most likely have a wrong reference in your project. Take a look in the file system and find out what version of the DLLs are in your project. Navigate to:

..\<project root>\CMS\bin

and look at any of the CMS.xxx.dll files properties for the version number. You most likely have the wrong version dll referenced in your project. Remove those old/bad references and add in the new dll references, then remove those web.config entries.