diff --git a/snowpack.config.js b/snowpack.config.js
index 763374a3..68f33242 100644
--- a/snowpack.config.js
+++ b/snowpack.config.js
@@ -5,7 +5,8 @@
 module.exports = {
   mount: {
     // More specific paths before less specific paths (if they overlap)
-    "src": "/",
+    "src/platform/web/docroot": "/",
+    "src": "/src",
     "lib": {url: "/lib", static: true },
     "assets": "/assets",
     /* ... */
diff --git a/src/matrix/SessionContainer.js b/src/matrix/SessionContainer.js
index d8977dde..fd523ac7 100644
--- a/src/matrix/SessionContainer.js
+++ b/src/matrix/SessionContainer.js
@@ -24,7 +24,8 @@ 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 {Sync, SyncStatus} from "./Sync.js";
+// import {Sync, SyncStatus} from "./Sync.js";
+import {Sync3, SyncStatus} from "./Sync3";
 import {Session} from "./Session.js";
 import {PasswordLoginMethod} from "./login/PasswordLoginMethod.js";
 import {TokenLoginMethod} from "./login/TokenLoginMethod.js";
@@ -254,7 +255,12 @@ export class SessionContainer {
             await log.wrap("createIdentity", log => this._session.createIdentity(log));
         }
         
-        this._sync = new Sync({hsApi: this._requestScheduler.hsApi, storage: this._storage, session: this._session, logger: this._platform.logger});
+        this._sync = new Sync3(
+            this._requestScheduler.hsApi,
+            this._session,
+            this._storage,
+            this._platform.logger,
+        );
         // notify sync and session when back online
         this._reconnectSubscription = this._reconnector.connectionStatus.subscribe(state => {
             if (state === ConnectionStatus.Online) {
diff --git a/src/matrix/Sync3.ts b/src/matrix/Sync3.ts
index 49863db7..4ebea551 100644
--- a/src/matrix/Sync3.ts
+++ b/src/matrix/Sync3.ts
@@ -236,7 +236,7 @@ export class Sync3 {
                     backoffCounter = 5;
                 }
                 const secs = Math.pow(2, backoffCounter);
-                console.log(`v3 /sync failed, backing off for ${secs}s`)
+                console.log(`v3 /sync failed, backing off for ${secs}s, err=`, err);
                 await sleep(secs * 1000);
             }
         }
diff --git a/src/matrix/net/HomeServerApi.js b/src/matrix/net/HomeServerApi.js
index 91ffc97c..a6d2aa14 100644
--- a/src/matrix/net/HomeServerApi.js
+++ b/src/matrix/net/HomeServerApi.js
@@ -111,7 +111,9 @@ export class HomeServerApi {
     }
 
     sync3(body, pos, timeout, options = null) {
-        return this._authedRequest("POST", this._url("/sync", "/_matrix/client/v3"), {timeout, pos}, body, options);
+        // FIXME TODO
+        const syncURL = "http://localhost:8008/_matrix/client/v3/sync";
+        return this._authedRequest("POST", syncURL, {timeout, pos}, body, options);
     }
 
     // params is from, dir and optionally to, limit, filter.