I'm getting this, too - in VS 2017, with the .SCSS file downloaded from Theme Studio.
Error in plugin "sass"
Error: Base-level rules cannot contain the parent-selector-referencing character '&'.
on line 10898 of wwwroot/css/ejsbootstrap.scss, in mixin `@content`
from line 111 of wwwroot/css/ejsbootstrap.scss, in mixin `export-module`
from line 10679 of wwwroot/css/ejsbootstrap.scss
>> &.e-bigger .e-switch-wrapper,
Hopefully that's enough to track this issue down.
JAJesus Arockia Sankaran S Syncfusion Team December 17, 2018 01:35 PM UTC
We appeal you to share below details which will be helpful to resolve this as earlier as possible.
sass complier name
share the sass complier process steps
Please get back to us with required details.
Jesus Arockia Sankaran S
FRfrederikDecember 17, 2018 03:06 PM UTC
Apologies - wanted to go and back and see the steps I followed but implemented another solution for now and moved this to the backlog. will update once i get back to seeing if I can use syncfusion for this.
All the best
JAJesus Arockia Sankaran S Syncfusion Team December 18, 2018 10:28 AM UTC
Thanks for you update and we will wait until hear from you further.