@TheoSys said in QT 6.8.0: Comparison of QDateTime is wrong:

Then it's my fault

No problem. Datetime with databases is not that easy as it seems so there might still be problems in the drivers even though I spent a lot of time with this 🙂

Same issue, I have also got this cmake warning:

-- qmlplugindump failed for org.kde.quickcharts. -- Could NOT find org.kde.quickcharts-QMLModule (missing: org.kde.quickcharts-QMLModule_FOUND) The qml plugin 'QuickChartsplugin' is a dependency of 'project', but the link target it defines (KF6::QuickChartsplugin) does not exist in the current scope. The plugin will not be linked.

@SimonSchroeder Thank you so much for the suggestion. I will try it out. Thank you.
Unfortunately with Qt Creator, I haven't found a solution. I tried reinstalling Qt completely. Nothing has changed. I hope we find a solution or maybe an update resolves this.

@BILAL-KHAN-34 Put the mouse cursor over the yellow warning icon to see the pop-up with the information about the problem.