Are you using a tool like Microsoft OneDrive? It could be another process such as OneDrive is trying to access the same files as Mendix Studio Pro when it is trying to compile your SASS and that is causing issues. If you are, try moving your Mendix project out of OneDrive and trying to build it again.
Good luck!
Hi Shireesha,
Changing 1 line in the file themesource > datawidgets > web > main.scss, Line 1:
1 @import "../../../theme/styles/web/sass/main";
like above may help you.
None of the approaches above solved my problem.
It seemed that the reason for the timeout error in my case was using a network drive to store my Mendix-project. After I moved the project to my local drive, the timeout error disappeared.
Had that issue as well today and just needed to "sync app directory" before starting the local webserver.
But maybe that was just luck. ;-)