diff --git a/networkProxy/src/beaconProxy.ts b/networkProxy/src/beaconProxy.ts
index 11eac6e33..7d2581c17 100644
--- a/networkProxy/src/beaconProxy.ts
+++ b/networkProxy/src/beaconProxy.ts
@@ -74,7 +74,7 @@ export class BeaconProxyHandler<T extends typeof navigator.sendBeacon> implement
 }
 
 export default class BeaconProxy {
-  public static origSendBeacon = window?.navigator?.sendBeacon
+  public static origSendBeacon = typeof window !== 'undefined' ? window.navigator?.sendBeacon : undefined
 
   public static hasSendBeacon() {
     return !!BeaconProxy.origSendBeacon
diff --git a/networkProxy/src/index.ts b/networkProxy/src/index.ts
index f5cd0ca68..c452eddfc 100644
--- a/networkProxy/src/index.ts
+++ b/networkProxy/src/index.ts
@@ -54,6 +54,7 @@ export default function createNetworkProxy(
   },
   tokenUrlMatcher?: (url: string) => boolean,
 ): void {
+  if (!context) return;
   if (modules.xhr) {
     if (context.XMLHttpRequest) {
       context.XMLHttpRequest = XHRProxy.create(
@@ -83,7 +84,7 @@ export default function createNetworkProxy(
     }
   }
   if (modules.beacon) {
-    if (context?.navigator?.sendBeacon) {
+    if (context.navigator?.sendBeacon) {
       context.navigator.sendBeacon = BeaconProxy.create(
         ignoredHeaders,
         setSessionTokenHeader,