diff --git a/apps/server/src/modules/board/controller/mapper/collaborative-text-editor-element-response.mapper.ts b/apps/server/src/modules/board/controller/mapper/collaborative-text-editor-element-response.mapper.ts
index d6dca93b18..9b70877f52 100644
--- a/apps/server/src/modules/board/controller/mapper/collaborative-text-editor-element-response.mapper.ts
+++ b/apps/server/src/modules/board/controller/mapper/collaborative-text-editor-element-response.mapper.ts
@@ -25,7 +25,7 @@ export class CollaborativeTextEditorElementResponseMapper implements BaseRespons
 		return result;
 	}
 
-	canMap(element: CollaborativeTextEditorElement): boolean {
+	canMap(element: unknown): boolean {
 		return element instanceof CollaborativeTextEditorElement;
 	}
 }
diff --git a/apps/server/src/modules/board/controller/mapper/drawing-element-response.mapper.ts b/apps/server/src/modules/board/controller/mapper/drawing-element-response.mapper.ts
index 089740fe73..1829f4d5cd 100644
--- a/apps/server/src/modules/board/controller/mapper/drawing-element-response.mapper.ts
+++ b/apps/server/src/modules/board/controller/mapper/drawing-element-response.mapper.ts
@@ -25,7 +25,7 @@ export class DrawingElementResponseMapper implements BaseResponseMapper {
 		return result;
 	}
 
-	canMap(element: DrawingElement): boolean {
+	canMap(element: unknown): boolean {
 		return element instanceof DrawingElement;
 	}
 }
diff --git a/apps/server/src/modules/board/controller/mapper/external-tool-element-response.mapper.ts b/apps/server/src/modules/board/controller/mapper/external-tool-element-response.mapper.ts
index 226eb65f90..36dd6706ab 100644
--- a/apps/server/src/modules/board/controller/mapper/external-tool-element-response.mapper.ts
+++ b/apps/server/src/modules/board/controller/mapper/external-tool-element-response.mapper.ts
@@ -24,7 +24,7 @@ export class ExternalToolElementResponseMapper implements BaseResponseMapper {
 		return result;
 	}
 
-	canMap(element: ExternalToolElement): boolean {
+	canMap(element: unknown): boolean {
 		return element instanceof ExternalToolElement;
 	}
 }
diff --git a/apps/server/src/modules/board/controller/mapper/file-element-response.mapper.ts b/apps/server/src/modules/board/controller/mapper/file-element-response.mapper.ts
index 6bf2eb5d8d..778a48cbbe 100644
--- a/apps/server/src/modules/board/controller/mapper/file-element-response.mapper.ts
+++ b/apps/server/src/modules/board/controller/mapper/file-element-response.mapper.ts
@@ -24,7 +24,7 @@ export class FileElementResponseMapper implements BaseResponseMapper {
 		return result;
 	}
 
-	canMap(element: FileElement): boolean {
+	canMap(element: unknown): boolean {
 		return element instanceof FileElement;
 	}
 }
diff --git a/apps/server/src/modules/board/controller/mapper/link-element-response.mapper.ts b/apps/server/src/modules/board/controller/mapper/link-element-response.mapper.ts
index 3c3cb0cce0..cde8ef1372 100644
--- a/apps/server/src/modules/board/controller/mapper/link-element-response.mapper.ts
+++ b/apps/server/src/modules/board/controller/mapper/link-element-response.mapper.ts
@@ -30,7 +30,7 @@ export class LinkElementResponseMapper implements BaseResponseMapper {
 		return result;
 	}
 
-	canMap(element: LinkElement): boolean {
+	canMap(element: unknown): boolean {
 		return element instanceof LinkElement;
 	}
 }
diff --git a/apps/server/src/modules/board/controller/mapper/rich-text-element-response.mapper.ts b/apps/server/src/modules/board/controller/mapper/rich-text-element-response.mapper.ts
index c845bc6334..bb9ab6877c 100644
--- a/apps/server/src/modules/board/controller/mapper/rich-text-element-response.mapper.ts
+++ b/apps/server/src/modules/board/controller/mapper/rich-text-element-response.mapper.ts
@@ -25,7 +25,7 @@ export class RichTextElementResponseMapper implements BaseResponseMapper {
 		return result;
 	}
 
-	canMap(element: RichTextElement): boolean {
+	canMap(element: unknown): boolean {
 		return element instanceof RichTextElement;
 	}
 }
diff --git a/apps/server/src/modules/board/controller/mapper/submission-container-element-response.mapper.ts b/apps/server/src/modules/board/controller/mapper/submission-container-element-response.mapper.ts
index b65a1b5654..6ef2a91e60 100644
--- a/apps/server/src/modules/board/controller/mapper/submission-container-element-response.mapper.ts
+++ b/apps/server/src/modules/board/controller/mapper/submission-container-element-response.mapper.ts
@@ -30,7 +30,7 @@ export class SubmissionContainerElementResponseMapper implements BaseResponseMap
 		return result;
 	}
 
-	canMap(element: SubmissionContainerElement): boolean {
+	canMap(element: unknown): boolean {
 		return element instanceof SubmissionContainerElement;
 	}
 }
diff --git a/apps/server/src/modules/board/controller/mapper/video-conference-element-response.mapper.ts b/apps/server/src/modules/board/controller/mapper/video-conference-element-response.mapper.ts
index 5184fab13b..1f02aefb4d 100644
--- a/apps/server/src/modules/board/controller/mapper/video-conference-element-response.mapper.ts
+++ b/apps/server/src/modules/board/controller/mapper/video-conference-element-response.mapper.ts
@@ -24,7 +24,7 @@ export class VideoConferenceElementResponseMapper implements BaseResponseMapper
 		return result;
 	}
 
-	canMap(element: VideoConferenceElement): boolean {
+	canMap(element: unknown): boolean {
 		return element instanceof VideoConferenceElement;
 	}
 }
diff --git a/apps/server/src/modules/board/domain/video-conference-element.do.ts b/apps/server/src/modules/board/domain/video-conference-element.do.ts
index 016057662f..de8a5b714b 100644
--- a/apps/server/src/modules/board/domain/video-conference-element.do.ts
+++ b/apps/server/src/modules/board/domain/video-conference-element.do.ts
@@ -3,7 +3,7 @@ import type { VideoConferenceElementProps } from './types';
 
 export class VideoConferenceElement extends BoardNode<VideoConferenceElementProps> {
 	get title(): string {
-		return this.props.title ?? '';
+		return this.props.title;
 	}
 
 	set title(value: string) {