MakerWorld model issues

I have printed a few MakerWorld models using Orca and the import function. Changing printer filament to U1 and Snapdpeed PLA and layer height to match models 20mm All items being printed are individual objects in the same 3mf project file

The last few attempts have proved fruitless. Cannot even get a good base layer. I even used a new roll of filament on a different print head to eliminate either of those as potential issues.

Here is what I am getting. Any ideas?

Thanks

Are you sure the issue is about the model base?

May print a one layer square as tall as your bed is to check your bed leveling?

Thanks Chris. I am guessing you are correct. I just tried printing a Snapmaker model with same results.

New to this and I would have never thought of it!

Running leveling now.

Garry Burke