diff --git a/locales/en/app.json b/locales/en/app.json
index 428cba58..87830f82 100644
--- a/locales/en/app.json
+++ b/locales/en/app.json
@@ -87,7 +87,7 @@
   "error": {
     "call_is_not_supported": "Call is not supported",
     "call_not_found": "Call not found",
-    "call_not_found_description": "<0>That link doesn't appear to belong to any existing call. Check that you have the right link, or <1>create a new one</1>.</0>",
+    "call_not_found_description": "<0>That link doesn't appear to belong to any existing call. Check that you have the right link, or <2>create a new one</2>.</0>",
     "connection_lost": "Connection lost",
     "connection_lost_description": "You were disconnected from the call.",
     "e2ee_unsupported": "Incompatible browser",
diff --git a/src/ErrorView.module.css b/src/ErrorView.module.css
index 14c5f141..bd68f5e3 100644
--- a/src/ErrorView.module.css
+++ b/src/ErrorView.module.css
@@ -12,6 +12,7 @@
 
 .error > h1 {
   margin: 0;
+  text-align: center;
 }
 
 .error > p {
diff --git a/src/ErrorView.tsx b/src/ErrorView.tsx
index ed4103c5..1309ae04 100644
--- a/src/ErrorView.tsx
+++ b/src/ErrorView.tsx
@@ -99,7 +99,7 @@ export const ErrorView: FC<Props> = ({
   return (
     <div className={styles.error}>
       <BigIcon className={styles.icon}>
-        <Icon />
+        <Icon aria-hidden />
       </BigIcon>
       <Heading as="h1" weight="semibold" size="md">
         {title}
diff --git a/src/room/GroupCallView.tsx b/src/room/GroupCallView.tsx
index 0ae6a96b..5b9b1f02 100644
--- a/src/room/GroupCallView.tsx
+++ b/src/room/GroupCallView.tsx
@@ -58,10 +58,9 @@ import { callEventAudioSounds } from "./CallEventAudioRenderer";
 import { useLatest } from "../useLatest";
 import { usePageTitle } from "../usePageTitle";
 import {
+  ConnectionLostError,
   E2EENotSupportedError,
   ElementCallError,
-  ErrorCode,
-  RTCSessionError,
   UnknownCallError,
 } from "../utils/errors.ts";
 import { GroupCallErrorBoundary } from "./GroupCallErrorBoundary.tsx";
@@ -153,14 +152,7 @@ export const GroupCallView: FC<Props> = ({
   useTypedEventEmitter(
     rtcSession,
     MatrixRTCSessionEvent.MembershipManagerError,
-    (error) => {
-      setExternalError(
-        new RTCSessionError(
-          ErrorCode.MEMBERSHIP_MANAGER_UNRECOVERABLE,
-          error.message ?? error,
-        ),
-      );
-    },
+    (error) => setExternalError(new ConnectionLostError()),
   );
   useEffect(() => {
     // Sanity check the room object
diff --git a/src/room/__snapshots__/GroupCallErrorBoundary.test.tsx.snap b/src/room/__snapshots__/GroupCallErrorBoundary.test.tsx.snap
index 6fd1ab40..79eb580b 100644
--- a/src/room/__snapshots__/GroupCallErrorBoundary.test.tsx.snap
+++ b/src/room/__snapshots__/GroupCallErrorBoundary.test.tsx.snap
@@ -112,6 +112,7 @@ exports[`ConnectionLostError: Action handling should reset error state 1`] = `
             data-size="large"
           >
             <svg
+              aria-hidden="true"
               fill="currentColor"
               height="1em"
               viewBox="0 0 24 24"
@@ -262,6 +263,7 @@ exports[`should have a close button in widget mode 1`] = `
             data-size="large"
           >
             <svg
+              aria-hidden="true"
               fill="currentColor"
               height="1em"
               viewBox="0 0 24 24"
@@ -414,6 +416,7 @@ exports[`should render the error page with link back to home 1`] = `
             data-size="large"
           >
             <svg
+              aria-hidden="true"
               fill="currentColor"
               height="1em"
               viewBox="0 0 24 24"
@@ -566,6 +569,7 @@ exports[`should report correct error for 'Call is not supported' 1`] = `
             data-size="large"
           >
             <svg
+              aria-hidden="true"
               fill="currentColor"
               height="1em"
               viewBox="0 0 24 24"
@@ -718,6 +722,7 @@ exports[`should report correct error for 'Connection lost' 1`] = `
             data-size="large"
           >
             <svg
+              aria-hidden="true"
               fill="currentColor"
               height="1em"
               viewBox="0 0 24 24"
@@ -868,6 +873,7 @@ exports[`should report correct error for 'Incompatible browser' 1`] = `
             data-size="large"
           >
             <svg
+              aria-hidden="true"
               fill="currentColor"
               height="1em"
               viewBox="0 0 24 24"
@@ -1015,6 +1021,7 @@ exports[`should report correct error for 'Insufficient capacity' 1`] = `
             data-size="large"
           >
             <svg
+              aria-hidden="true"
               fill="currentColor"
               height="1em"
               viewBox="0 0 24 24"
diff --git a/src/utils/errors.ts b/src/utils/errors.ts
index a3df68d0..674cfdec 100644
--- a/src/utils/errors.ts
+++ b/src/utils/errors.ts
@@ -13,7 +13,6 @@ export enum ErrorCode {
    */
   MISSING_MATRIX_RTC_FOCUS = "MISSING_MATRIX_RTC_FOCUS",
   CONNECTION_LOST_ERROR = "CONNECTION_LOST_ERROR",
-  MEMBERSHIP_MANAGER_UNRECOVERABLE = "MEMBERSHIP_MANAGER_UNRECOVERABLE",
   /** LiveKit indicates that the server has hit its track limits */
   INSUFFICIENT_CAPACITY_ERROR = "INSUFFICIENT_CAPACITY_ERROR",
   E2EE_NOT_SUPPORTED = "E2EE_NOT_SUPPORTED",
@@ -25,7 +24,6 @@ export enum ErrorCategory {
   /** Calling is not supported, server misconfigured (JWT service missing, no MSC support ...)*/
   CONFIGURATION_ISSUE = "CONFIGURATION_ISSUE",
   NETWORK_CONNECTIVITY = "NETWORK_CONNECTIVITY",
-  RTC_SESSION_FAILURE = "RTC_SESSION_FAILURE",
   CLIENT_CONFIGURATION = "CLIENT_CONFIGURATION",
   UNKNOWN = "UNKNOWN",
   // SYSTEM_FAILURE / FEDERATION_FAILURE ..
@@ -84,11 +82,6 @@ export class ConnectionLostError extends ElementCallError {
   }
 }
 
-export class RTCSessionError extends ElementCallError {
-  public constructor(code: ErrorCode, message: string) {
-    super("RTCSession Error", code, ErrorCategory.RTC_SESSION_FAILURE, message);
-  }
-}
 export class E2EENotSupportedError extends ElementCallError {
   public constructor() {
     super(
@@ -106,7 +99,7 @@ export class UnknownCallError extends ElementCallError {
       t("error.generic"),
       ErrorCode.UNKNOWN_ERROR,
       ErrorCategory.UNKNOWN,
-      error.message,
+      undefined,
       // Properly set it as a cause for a better reporting on sentry
       error,
     );