How to identify and solve problems with a layers CRS coordinate reference system

In most cases, problems with the CRS are discovered when loading a new layer.
If the layer is not located correctly, probably QGIS assumes a wrong CRS and you should correct it manually.
This is a how to

[@VistaTigerEye]

Great demonstration! sometimes it's difficult to figure out the issue

[@user-lv4gs8xk2s]

Hi, I did it, but it still gives me problems. Do you teach privately? I would like to book some classes please :D

[@Yairsuari]

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