Lost in space and zoom extents isn't working and I can't see the axes. Please, how do I get my model back?

I lost my model suddenly after i placed a curved structure and i tried Zoom Extents but it didn t work nor can i see axes or draw anything any help on how to get my model back?

Here is the file-
Building 001-(concept).skp (7.4 MB)

Building 001-fixed.skp (6.7 MB)

I selected all in the model and used Zoom Selection after Zoom Extents failed.

I also fixed the incorrect tag usage and purged unused stuff from the model. Not a lot but enough.
Screenshot - 9_23_2023 , 10_27_40 AM

Legend! Thank you very much