Qt 5.14 MSVC2017 have some runtime errors ，how to solve？

[cxyLi]

libpng warning: iCCP: known incorrect sRGB profile
QObject::connect(QObject, qge::InventoryViewer): invalid nullptr parameter
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DirectShowPlayerService::doRender: Unknown error 0x8004022a.
DirectShowPlayerService::doRender: Unknown error 0x8004022a.
QObject::disconnect: Unexpected nullptr parameter
QObject::disconnect: Unexpected nullptr parameter
QObject::disconnect: Unexpected nullptr parameter