diff --git a/plugins/devtools-common/report-alpha.api.md b/plugins/devtools-common/report-alpha.api.md
index e11b2d62ca..3c3b7ff89e 100644
--- a/plugins/devtools-common/report-alpha.api.md
+++ b/plugins/devtools-common/report-alpha.api.md
@@ -6,11 +6,6 @@
 import { BasicPermission } from '@backstage/plugin-permission-common';
 import { JsonObject } from '@backstage/types';
 
-// @alpha (undocumented)
-export type CancelScheduledTask = {
-  error?: string;
-};
-
 // @alpha (undocumented)
 export const devToolsTaskSchedulerCreatePermission: BasicPermission;
 
diff --git a/plugins/devtools-common/src/alpha.ts b/plugins/devtools-common/src/alpha.ts
index d7f9f94d76..7abe4b1f5e 100644
--- a/plugins/devtools-common/src/alpha.ts
+++ b/plugins/devtools-common/src/alpha.ts
@@ -13,12 +13,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 export {
   devToolsTaskSchedulerReadPermission,
   devToolsTaskSchedulerCreatePermission,
 } from './permissions';
 export type {
-  CancelScheduledTask,
   ScheduledTasks,
   TaskApiTasksResponse,
   TriggerScheduledTask,
diff --git a/plugins/devtools-common/src/types.ts b/plugins/devtools-common/src/types.ts
index 3879fb1ae3..dc35188fde 100644
--- a/plugins/devtools-common/src/types.ts
+++ b/plugins/devtools-common/src/types.ts
@@ -133,8 +133,3 @@ export type ScheduledTasks = {
 export type TriggerScheduledTask = {
   error?: string;
 };
-
-/** @alpha */
-export type CancelScheduledTask = {
-  error?: string;
-};
diff --git a/plugins/devtools/src/api/DevToolsApi.ts b/plugins/devtools/src/api/DevToolsApi.ts
index 6894a0a8b2..2aaad49aa8 100644
--- a/plugins/devtools/src/api/DevToolsApi.ts
+++ b/plugins/devtools/src/api/DevToolsApi.ts
@@ -21,7 +21,6 @@ import {
   ExternalDependency,
 } from '@backstage/plugin-devtools-common';
 import {
-  CancelScheduledTask,
   ScheduledTasks,
   TriggerScheduledTask,
 } from '@backstage/plugin-devtools-common/alpha';
@@ -39,8 +38,5 @@ export interface DevToolsApi {
     plugin: string,
     taskId: string,
   ): Promise<TriggerScheduledTask>;
-  cancelScheduledTask(
-    plugin: string,
-    taskId: string,
-  ): Promise<CancelScheduledTask>;
+  cancelScheduledTask(plugin: string, taskId: string): Promise<void>;
 }
diff --git a/plugins/devtools/src/api/DevToolsClient.ts b/plugins/devtools/src/api/DevToolsClient.ts
index c5b50193ea..b6d9d4b119 100644
--- a/plugins/devtools/src/api/DevToolsClient.ts
+++ b/plugins/devtools/src/api/DevToolsClient.ts
@@ -21,11 +21,10 @@ import {
   ExternalDependency,
 } from '@backstage/plugin-devtools-common';
 import {
-  CancelScheduledTask,
   ScheduledTasks,
   TriggerScheduledTask,
 } from '@backstage/plugin-devtools-common/alpha';
-import { ResponseError } from '@backstage/errors';
+import { ResponseError, NotFoundError, ConflictError } from '@backstage/errors';
 import { DevToolsApi } from './DevToolsApi';
 
 export class DevToolsClient implements DevToolsApi {
@@ -83,13 +82,13 @@ export class DevToolsClient implements DevToolsApi {
       throw await ResponseError.fromResponse(response);
     }
 
-    return response.json() as Promise<TriggerScheduledTask>;
+    return {};
   }
 
   public async cancelScheduledTask(
     plugin: string,
     taskId: string,
-  ): Promise<CancelScheduledTask> {
+  ): Promise<void> {
     const baseUrl = `${await this.discoveryApi.getBaseUrl(plugin)}/`;
     const url = new URL(
       `.backstage/scheduler/v1/tasks/${encodeURIComponent(taskId)}/cancel`,
@@ -101,10 +100,13 @@ export class DevToolsClient implements DevToolsApi {
     });
 
     if (!response.ok) {
+      if (response.status === 404) {
+        throw new NotFoundError(`Task ${taskId} not found`);
+      } else if (response.status === 409) {
+        throw new ConflictError(`Task ${taskId} is not running`);
+      }
       throw await ResponseError.fromResponse(response);
     }
-
-    return response.json() as Promise<CancelScheduledTask>;
   }
 
   public async getExternalDependencies(): Promise<
diff --git a/plugins/devtools/src/components/Content/ScheduledTasksContent/ScheduledTasksContent.tsx b/plugins/devtools/src/components/Content/ScheduledTasksContent/ScheduledTasksContent.tsx
index d115968a77..af86b9b237 100644
--- a/plugins/devtools/src/components/Content/ScheduledTasksContent/ScheduledTasksContent.tsx
+++ b/plugins/devtools/src/components/Content/ScheduledTasksContent/ScheduledTasksContent.tsx
@@ -288,7 +288,7 @@ export const ScheduledTasksContent = () => {
         )}
       />
 
-      {loading && <Progress />}
+      {loading && !scheduledTasks && <Progress />}
 
       {error && (
         <ErrorPanel
@@ -317,7 +317,7 @@ export const ScheduledTasksContent = () => {
         </ErrorPanel>
       )}
 
-      {!loading && !error && (
+      {scheduledTasks && (
         <Table
           title={`Scheduled Tasks (${selectedPlugin})`}
           options={{
@@ -325,6 +325,7 @@ export const ScheduledTasksContent = () => {
             search: true,
             sorting: true,
             searchFieldAlignment: 'right',
+            padding: 'dense',
           }}
           columns={columns}
           data={scheduledTasks || []}