diff --git a/apps/server/src/modules/board-context/board-context-api-helper.service.ts b/apps/server/src/modules/board-context/board-context-api-helper.service.ts
index ae0ce0bd5d..9569ab11e6 100644
--- a/apps/server/src/modules/board-context/board-context-api-helper.service.ts
+++ b/apps/server/src/modules/board-context/board-context-api-helper.service.ts
@@ -1,7 +1,7 @@
 import { BoardExternalReference, BoardExternalReferenceType, BoardNodeService, ColumnBoard } from '@modules/board';
 import { CourseService } from '@modules/learnroom';
 import { RoomService } from '@modules/room';
-import { Injectable } from '@nestjs/common';
+import { BadRequestException, Injectable } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { CourseFeatures } from '@shared/domain/entity';
 import { EntityId, SchoolFeature } from '@shared/domain/types';
@@ -81,7 +81,7 @@ export class BoardContextApiHelperService {
 		}
 
 		/* istanbul ignore next */
-		throw new Error(`Unsupported board reference type ${context.type as string}`);
+		throw new BadRequestException(`Unsupported board reference type ${context.type as string}`);
 	}
 
 	private isVideoConferenceEnabledForCourse(courseFeatures?: CourseFeatures[]): boolean {
diff --git a/apps/server/src/modules/board/service/board-node-authorizable.service.ts b/apps/server/src/modules/board/service/board-node-authorizable.service.ts
index c36b669fdf..c6cc8197b6 100644
--- a/apps/server/src/modules/board/service/board-node-authorizable.service.ts
+++ b/apps/server/src/modules/board/service/board-node-authorizable.service.ts
@@ -24,7 +24,7 @@ export class BoardNodeAuthorizableService implements AuthorizationLoaderService
 	/**
 	 * @deprecated
 	 */
-	async findById(id: EntityId): Promise<BoardNodeAuthorizable> {
+	public async findById(id: EntityId): Promise<BoardNodeAuthorizable> {
 		const boardNode = await this.boardNodeRepo.findById(id, 1);
 
 		const boardNodeAuthorizable = this.getBoardAuthorizable(boardNode);
@@ -32,7 +32,7 @@ export class BoardNodeAuthorizableService implements AuthorizationLoaderService
 		return boardNodeAuthorizable;
 	}
 
-	async getBoardAuthorizable(boardNode: AnyBoardNode): Promise<BoardNodeAuthorizable> {
+	public async getBoardAuthorizable(boardNode: AnyBoardNode): Promise<BoardNodeAuthorizable> {
 		const rootNode = await this.boardNodeService.findRoot(boardNode, 1);
 		const parentNode = await this.boardNodeService.findParent(boardNode, 1);
 		const users = await this.boardContextService.getUsersWithBoardRoles(rootNode);
@@ -48,15 +48,14 @@ export class BoardNodeAuthorizableService implements AuthorizationLoaderService
 		return boardNodeAuthorizable;
 	}
 
-	async getBoardAuthorizables(boardNodes: AnyBoardNode[]): Promise<BoardNodeAuthorizable[]> {
+	public async getBoardAuthorizables(boardNodes: AnyBoardNode[]): Promise<BoardNodeAuthorizable[]> {
 		const rootIds = boardNodes.map((node) => node.rootId);
 		const parentIds = boardNodes.map((node) => node.parentId).filter((defined) => defined) as EntityId[];
 		const boardNodeMap = await this.getBoardNodeMap([...rootIds, ...parentIds]);
 		const promises = boardNodes.map(async (boardNode) => {
 			const rootNode = boardNodeMap[boardNode.rootId];
-			return this.boardContextService.getUsersWithBoardRoles(rootNode).then((users) => {
-				return { id: boardNode.id, users };
-			});
+			const users = await this.boardContextService.getUsersWithBoardRoles(rootNode);
+			return { id: boardNode.id, users };
 		});
 
 		const results = await Promise.all(promises);