3 files changed, 9 insertions, 4 deletions

diff --git a/client/src/app/videos/+video-watch/comment/video-comment-add.component.ts b/client/src/app/videos/+video-watch/comment/video-comment-add.component.ts
index 5784efcdf..0f7c19765 100644
--- a/client/src/app/videos/+video-watch/comment/video-comment-add.component.ts
+++ b/client/src/app/videos/+video-watch/comment/video-comment-add.component.ts
@@ -57,7 +57,7 @@ export class VideoCommentAddComponent extends FormReactive implements OnInit {
 
       if (this.parentComment) {
         const mentions = this.parentComments
-          .filter(c => c.account.id !== this.user.account.id) // Don't add mention of ourselves
+          .filter(c => c.account && c.account.id !== this.user.account.id) // Don't add mention of ourselves
           .map(c => '@' + c.by)
 
         const mentionsSet = new Set(mentions)
diff --git a/client/src/app/videos/+video-watch/comment/video-comment.component.ts b/client/src/app/videos/+video-watch/comment/video-comment.component.ts
index f7eca45fd..1313b6585 100644
--- a/client/src/app/videos/+video-watch/comment/video-comment.component.ts
+++ b/client/src/app/videos/+video-watch/comment/video-comment.component.ts
@@ -125,7 +125,12 @@ export class VideoCommentComponent implements OnInit, OnChanges {
     const html = await this.markdownService.textMarkdownToHTML(this.comment.text, true)
     this.sanitizedCommentHTML = await this.markdownService.processVideoTimestamps(html)
     this.newParentComments = this.parentComments.concat([ this.comment ])
-    this.commentAccount = new Account(this.comment.account)
-    this.getUserIfNeeded(this.commentAccount)
+
+    if (this.comment.account) {
+      this.commentAccount = new Account(this.comment.account)
+      this.getUserIfNeeded(this.commentAccount)
+    } else {
+      this.comment.account = null
+    }
   }
 }
diff --git a/client/src/app/videos/+video-watch/comment/video-comments.component.ts b/client/src/app/videos/+video-watch/comment/video-comments.component.ts
index f2bb5c464..f1408effb 100644
--- a/client/src/app/videos/+video-watch/comment/video-comments.component.ts
+++ b/client/src/app/videos/+video-watch/comment/video-comments.component.ts
@@ -183,7 +183,7 @@ export class VideoCommentsComponent implements OnInit, OnChanges, OnDestroy {
           // Mark the comment as deleted
           this.softDeleteComment(commentToDelete)
 
-          if (this.highlightedThread.id === commentToDelete.id) this.highlightedThread = undefined
+          if (this.highlightedThread?.id === commentToDelete.id) this.highlightedThread = undefined
         },
 
         err => this.notifier.error(err.message)