Cannot pass compile project of MP

I downloaded MP source codes from github master,But cannot pass compile project by VS2019.(too many errors and warnings )
whether there is need install former version Visual Studio(VS2017)?

did you update the submodules after cloning the repo ?
git submodule update --init --recursive

Just update submodule,the entire missplanner project also could not be complied.IDE is VS2019 v16.10

Can you take a look at what the error is and your VS2019 configuration

some errors were about version of .NET framework.And I modified them.But all errors were eliminated,‘start’project,a prompt window show“visual studio cannot start debug,due to missing debug target”