Hi Rishi,
Can you please try out below link
https://forum.mendix.com/link/space/app-development/questions/4753
Hope it works
Resolved.
The answer is font-triplet name is user defined, the same userdefined name should be mentioned in CSS.
Note: lowercase only allowed for font-triplet name. eg., bradleyhanditc, myown..
CSS should be
font-family:myown;
font-family:bradleyhanditc;