In QT5 Creator, I changed the compiler version in the project kit, but it's throwing the above error now(note: 'g++' in this context refers to version 10, which QT5 isn't compatible with). I found some information on using terminal commands to change some stuff with qmake, but does anyone know how I can fix this?
Edit: To clarify, a kit different from the default kit is being used for this project(that's what I changed), and I'm migrating this project from QT4 to QT5. This is installed on Ubuntu, and there aren't multiple versions of QT on here(installed from Ubuntu repositories)