Model is grayed out and does not show the space type colors.
Do you have monochrome or hidden lines mode set? They won’t show materials or colors on faces.
Are you using Openstudio plugin? I am not familiar with that plugin, maybe it uses a style setting that you accidentally turned of?
Open the styles panel and check which styles thee are in the model. (Window->Styles , click on the little house icon)
Btw. I noticed a tilde ‘~’ in your filename, which most likely indicates you are editing the ‘backup file’
Check the folder for original, might be that the colors are there…