'ASSERT: "i >= 0 && i < size()" in file Qt/6.2.4/mingw_64/include/QtCore/qstring.h

i am a noob in Qt, when a push a particular push button, the project window closes and shows this error:

ASSERT: "i >= 0 && i < size()" in file Qt/6.2.4/mingw_64/include/QtCore/qstring.h

What is it? Is there something i can do to solve this?



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