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I created a basic project, I try to run it, and it gives me strange errors. What it is?
Hi and welcome to devnet,
Can you show your .pro file ?
It looks fine.
What version of Qt are you using ?
Does the Kit you are using show any error ?
As suggested by the last lines, you have an issue with your kit.
And from the looks of it, you likely have a 32bit version of MinGW while Qt 5.12 is provided in 64bit for it.