Custom css file in Mendix not deployed

Hi, I’m trying to add some custom css in Mendix 8. I follow this link: (It says version 9, but I think it’s the same approach for 8). Now after doing the changes described in the above link, I synchronize the project directory and start run the project locally. When I do this, all my changes to the scss files are not deployed, even the files that I added are not deployed. If I check the files that I have changed or added Mendix shows the correct files, but I don’t see them being deployed. So my question is: What could I be missing in order for my files with changes for the scss, don’t be deployed locally?
1 answers

It did change a bit between Mx8 and Mx9. Here's an explanation: