diff --git a/frontend/src/app/components/difficulty/difficulty.component.ts b/frontend/src/app/components/difficulty/difficulty.component.ts
index 7f305416f..81084f524 100644
--- a/frontend/src/app/components/difficulty/difficulty.component.ts
+++ b/frontend/src/app/components/difficulty/difficulty.component.ts
@@ -194,7 +194,7 @@ export class DifficultyComponent implements OnInit {
 
   @HostListener('pointerdown', ['$event'])
   onPointerDown(event): void {
-    if (this.epochSvgElement.nativeElement?.contains(event.target)) {
+    if (this.epochSvgElement?.nativeElement?.contains(event.target)) {
       this.onPointerMove(event);
       event.preventDefault();
     }
@@ -202,7 +202,7 @@ export class DifficultyComponent implements OnInit {
 
   @HostListener('pointermove', ['$event'])
   onPointerMove(event): void {
-    if (this.epochSvgElement.nativeElement?.contains(event.target)) {
+    if (this.epochSvgElement?.nativeElement?.contains(event.target)) {
       this.tooltipPosition = { x: event.clientX, y: event.clientY };
       this.cd.markForCheck();
     }