Microsoft.MakeFile.targets(44, 5): [MSB3073] Command "

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Regenerate the solution, delete those folders, I found that it doesn't work, but I can only search on the Internet

Remove .vs, .idea, .vsconfig, Binaries, Intermediate, Saved, DerivedDataCache and add-on solutions and make Visual Studio project files by right-clicking on the .uproject file and clicking Generate Visual Studio Project Files,

https://forums.unrealengine.com/t/microsoft-makefile-targets-45-5-msb3073-exited-with-code-6-error/267688/13