Missing modules?

So when I go to open my project I now get this alert

the following modules are missing or built with a different engine version:

project

would you like to rebuild them now? Y/N
and if I hit yes I get “project could not be compiled. Try rebuilding from source manually?” um help

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Hello,

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Thanks

Since I solved my own problem today abiet by accident, here is the cause of the error. You add a c++ class with out Microsoft visual studio (or what ever your compiler of choice is) then save. that creates the missing modules, I guess turn off and reboot the computer then let the program do its thing after downloading the latest c++ distributable. click the project, click yes to rebuild, make sure your hard disk is nice and happy then wait for the program to do the work for you. Silly me after getting my new laptop forgot to download visual studio. Case closed

This error resulted from renaming/deleting the /Intermediate/Source folder, and also the /Source folder. Only one of those should be enabled (not deleted). Each will contain the .Build.cs and .Target.cs files. Those are the “modules” that the .uproject is looking for at launch.