Seems like there is some issue with the source code. Could you please share the build logs (VS) with us?
Let me have a look.
May I know which version of software are you using? And on which Cypress product (chip name) are you working?
You can try using the latest version of mesh clientcontrol from the below link, which goes as part of the BTSDK in Modustoolbox software environment.
I downloaded the install package of WICED Studio 6.4.0 Windows Installer.exe or WICED Studio 6.6.0 Windows Installer.exe. After installing with chip name 20735-B1_Bluetooth, I compiled source code project in WICED-Studio 6.6\common\apps\snip\mesh\peerapps\Windows\MeshClient with VS 2019. The error report is that the directory of WICED-Studio-6.6\common\libraries\mesh_core_lib doesn't exsist.
Could you please try using latest version of mesh ClientControl from the below link. Modustoolbox the latest software environment for embedded application development also provides 20735B1 support and the latest bug fixes will also be pushed to it.
Also, please note that, support for Bluetooth SoC devices has been deprecated From WICED6.6 in favor of the ModusToolbox BT SDK, which is now the preferred tool and software solution for new designs. Support for Bluetooth applications on Wi-Fi + Bluetooth combo devices remains supported in WICED 6.6.
Please let us know if you have any specific concerns.