diff --git a/packages/template/src/lib/stack-app/apps/implementations/event-tracker.ts b/packages/template/src/lib/stack-app/apps/implementations/event-tracker.ts
index 1869d8d79..e8b3a0880 100644
--- a/packages/template/src/lib/stack-app/apps/implementations/event-tracker.ts
+++ b/packages/template/src/lib/stack-app/apps/implementations/event-tracker.ts
@@ -290,7 +290,8 @@ export class EventTracker {
     }
 
     if (!res.data.ok) {
-      captureWarning("EventTracker.flush()", new Error(`EventTracker flush failed: ${res.data.status} ${await res.data.text()}`));
+      const body = await res.data.text().catch(() => "<unable to read response body>");
+      captureWarning("EventTracker.flush()", new Error(`EventTracker flush failed: ${res.data.status} ${body}`));
     }
   }
 
diff --git a/packages/template/src/lib/stack-app/apps/implementations/session-replay.ts b/packages/template/src/lib/stack-app/apps/implementations/session-replay.ts
index a519b133d..28f65323f 100644
--- a/packages/template/src/lib/stack-app/apps/implementations/session-replay.ts
+++ b/packages/template/src/lib/stack-app/apps/implementations/session-replay.ts
@@ -261,7 +261,8 @@ export class SessionRecorder {
       }
 
       if (!res.data.ok) {
-        captureWarning("SessionRecorder.flush()", new Error(`SessionRecorder flush failed: ${res.data.status} ${await res.data.text()}`));
+        const body = await res.data.text().catch(() => "<unable to read response body>");
+        captureWarning("SessionRecorder.flush()", new Error(`SessionRecorder flush failed: ${res.data.status} ${body}`));
       }
     } finally {
       this._flushInProgress = false;