@Rene1695 How have you got it set up in your config.js? Mine looks like this, and works with my icons:
coloredText: true,
customEvents: [
{keyword: 'Birthday', symbol: 'fa-birthday-cake', color: 'Gold'},
{keyword: 'Clinic', symbol: 'biohazard', color: 'Silver'},
{keyword: 'injection', symbol: 'syringe', color: 'Silver'},
{keyword: 'meds', symbol: 'pills', color: 'Silver'},
{keyword: 'Scales', symbol: 'weight', color: 'Pink'},
{keyword: 'pictures', symbol: 'camera', color: 'Pink'},
{keyword: 'recycling', symbol: 'recycle', color: 'Red'},
{keyword: 'rubbish', symbol: 'trash-alt', color: 'Red'},
{keyword: 'live ', symbol: 'music', color: 'Aqua'},
{keyword: 'gig', symbol: 'music', color: 'Aqua'},
{keyword: 'delivery', symbol: 'truck', color: 'GreenYellow'},
{keyword: 'leave', symbol: 'beer', color: 'yellow'},
{keyword: 'anniversary', symbol: 'beer', color: 'yellow'},
{keyword: 'a/l', symbol: 'bed', color: 'aqua'}
],