diff --git a/src/matrix/SessionContainer.js b/src/matrix/SessionContainer.js
index 5191e745..55acd4e7 100644
--- a/src/matrix/SessionContainer.js
+++ b/src/matrix/SessionContainer.js
@@ -21,7 +21,6 @@ import {Reconnector, ConnectionStatus} from "./net/Reconnector.js";
 import {ExponentialRetryDelay} from "./net/ExponentialRetryDelay.js";
 import {MediaRepository} from "./net/MediaRepository.js";
 import {RequestScheduler} from "./net/RequestScheduler.js";
-import {HomeServerError, ConnectionError, AbortError} from "./error.js";
 import {Sync, SyncStatus} from "./Sync.js";
 import {Session} from "./Session.js";
 
@@ -124,7 +123,7 @@ export class SessionContainer {
                 await this._platform.sessionInfoStorage.add(sessionInfo);            
             } catch (err) {
                 this._error = err;
-                if (err instanceof HomeServerError) {
+                if (err.name === "HomeServerError") {
                     if (err.errcode === "M_FORBIDDEN") {
                         this._loginFailure = LoginFailure.Credentials;
                     } else {
@@ -132,7 +131,7 @@ export class SessionContainer {
                     }
                     log.set("loginFailure", this._loginFailure);
                     this._status.set(LoadStatus.LoginFailed);
-                } else if (err instanceof ConnectionError) {
+                } else if (err.name === "ConnectionError") {
                     this._loginFailure = LoginFailure.Connection;
                     this._status.set(LoadStatus.LoginFailed);
                 } else {
@@ -253,7 +252,7 @@ export class SessionContainer {
             }
         } catch (err) {
             // if dispose is called from stop, bail out
-            if (err instanceof AbortError) {
+            if (err.name === "AbortError") {
                 return;
             }
             throw err;