Thank you for your advice. The build was successful !!

Follow the steps to build, but it fails.
How can this be solved?

build it in this step.

1. Download Project Tool for R23 and place it under C drive
   C:\projecttool

2. After installing R23, extract sdk.zip under C drive
   C:\sdk

3. Run the Project Tool at the command prompt
   C:\projecttool\kernel_app_64bit.exe g_updateproject = C:\sdk

4. Open C:\sdk\plugins\project\plugins.sln using VS2019

5. Run solution build

6. Build fails

Error	C2079	'maxon::ResultBase<RESULT_TYPE>::_value' uses undefined class 'maxon::BlendAnimationRef'	math.framework	C:\sdk\frameworks\core.framework\source\maxon\utilities\resultbase.h	571
Error	LNK1104	cannot open file 'C:\sdk\plugins\project\_obj\math.framework\x64_Debug\math.framework_Debug_64bit.lib'	maxonsdk.module	C:\sdk\plugins\maxonsdk.module\project\LINK	1