I am having the same issue on QGIS 3.10 or the long term release, 3.4

If I go to Settings > Custom Projection and add a name and parameters, the "OK" button does nothing.

I have tried clicking the plus button before and after adding the name and parameters, it makes no difference.

I have read similar questions:

but none of their answers work for me.

I have tried uninstalling and reinstalling different versions of QGIS, and have tried granting write permissions to folders within the QGIS directory.

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  • 2
    Welcome to GIS SE! The custom projection seems to be already added. You can see it in the list. Commented Nov 12, 2019 at 21:18


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