diff --git a/README.md b/README.md
index 4a6886ed85..ec34b4f8ce 100644
--- a/README.md
+++ b/README.md
@@ -140,12 +140,13 @@ Development mode allows for live reloading and a smoother development process.
 
 ```bash
 cd dev/prod
+rush validate
 rushx dev-server
 ```
 
 Then go to http://localhost:8080
 
-Use the following login credentials:
+Click on "Login with password" link on the bottom of the right panel and use the following login credentials:
 
 ```plain
 Email: user1
diff --git a/dev/tool/src/markup.ts b/dev/tool/src/markup.ts
index 7c194924ff..8b889614d9 100644
--- a/dev/tool/src/markup.ts
+++ b/dev/tool/src/markup.ts
@@ -197,8 +197,12 @@ async function processMigrateMarkupFor (
           const blob = await storageAdapter.stat(ctx, workspaceId, documentId)
           // only for documents not in storage
           if (blob === undefined) {
-            const ydoc = markupToYDoc(value, attribute.name)
-            await saveCollaborativeDoc(storageAdapter, workspaceId, collaborativeDoc, ydoc, ctx)
+            try {
+              const ydoc = markupToYDoc(value, attribute.name)
+              await saveCollaborativeDoc(storageAdapter, workspaceId, collaborativeDoc, ydoc, ctx)
+            } catch (err) {
+              console.error('failed to process document', doc._class, doc._id, err)
+            }
           }
         }
       }
diff --git a/models/core/src/migration.ts b/models/core/src/migration.ts
index 7282d9ae27..8b3130a753 100644
--- a/models/core/src/migration.ts
+++ b/models/core/src/migration.ts
@@ -230,8 +230,12 @@ async function processMigrateContentFor (
             const blob = await storageAdapter.stat(ctx, client.workspaceId, documentId)
             // only for documents not in storage
             if (blob === undefined) {
-              const ydoc = markupToYDoc(value, attribute.name)
-              await saveCollaborativeDoc(storageAdapter, client.workspaceId, collaborativeDoc, ydoc, ctx)
+              try {
+                const ydoc = markupToYDoc(value, attribute.name)
+                await saveCollaborativeDoc(storageAdapter, client.workspaceId, collaborativeDoc, ydoc, ctx)
+              } catch (err) {
+                console.error('failed to process document', doc._class, doc._id, err)
+              }
             }
 
             update[attributeName] = collaborativeDoc