How to fix "main.moc" creation error?

Question

Qt

I am writing a program in Qt C ++, for some functions of its libraries to work, the "main.moc" file is needed, which qmake generates. Actually, running it to generate a file does nothing good. The build console says "jom 1.1.2 - empower your cores" and the compiler complains that "dependent 'release\main.moc' does not exist.". What should be done to fix this problem?