Dxf import after Beam Studio Update

After the last update Ver1.8.3 to beam studio I now have some .dxf files which will not open in the program.

These files were previously used and opened with no problem. I do not receive any error message or warning about the files, simply nothing happens.

Some files still work and the program will ask me for the scale of the .dxf to import. But other files now no longer work and I can’t identify anything specific difference between files.