In loading the COLR and variable font Nabla from google fonts ( https://fonts.google.com/specimen/Nabla?preview.text=This%20is%20a%20test&preview.text_type=custom&query=Nabla ) the current FontCreator 14.0 does not render/display the glyphs correctly.
In addition, it gets very sluggish and seems to essentially hang.
I can confirm the issue. If I try to open it in FontCreator 13, I get an error message: Unknown COLR table version (1).
Nabla has both SVG and COLRv1 outlines.
FontCreator currently does not support COLR version 1, only version 0 is supported.
The SVG part is supported by the specs, but is a little too complicated for FontCreator, so that’s why it renders numerous glyphs on top of each other.