diff --git a/x-pack/platform/packages/shared/kbn-apm-types/src/es_schemas/raw/fields/server.ts b/x-pack/platform/packages/shared/kbn-apm-types/src/es_schemas/raw/fields/server.ts
index 49e3520f19fce..c170426e4f736 100644
--- a/x-pack/platform/packages/shared/kbn-apm-types/src/es_schemas/raw/fields/server.ts
+++ b/x-pack/platform/packages/shared/kbn-apm-types/src/es_schemas/raw/fields/server.ts
@@ -7,5 +7,5 @@
 
 export interface Server {
   address?: string;
-  port?: string;
+  port?: number;
 }
diff --git a/x-pack/solutions/observability/plugins/apm/public/components/app/error_group_details/error_sampler/error_sample_detail.tsx b/x-pack/solutions/observability/plugins/apm/public/components/app/error_group_details/error_sampler/error_sample_detail.tsx
index 4d147e78237cb..462f33b83a4a3 100644
--- a/x-pack/solutions/observability/plugins/apm/public/components/app/error_group_details/error_sampler/error_sample_detail.tsx
+++ b/x-pack/solutions/observability/plugins/apm/public/components/app/error_group_details/error_sampler/error_sample_detail.tsx
@@ -56,6 +56,7 @@ import { ErrorTabKey, getTabs } from './error_tabs';
 import { ErrorUiActionsContextMenu } from './error_ui_actions_context_menu';
 import { SampleSummary } from './sample_summary';
 import { ErrorSampleContextualInsight } from './error_sample_contextual_insight';
+import { buildUrl } from '../../../../utils/build_url';
 
 const TransactionLinkName = styled.div`
   margin-left: ${({ theme }) => theme.euiTheme.size.s};
@@ -154,11 +155,22 @@ export function ErrorSampleDetails({
 
   const tabs = getTabs(error);
   const currentTab = getCurrentTab(tabs, detailTab) as ErrorTab;
+  const urlFromError = error.error.page?.url || error.url?.full;
+  const urlFromTransaction = transaction?.transaction?.page?.url || transaction?.url?.full;
+  const errorOrTransactionUrl = error?.url ? error : transaction;
+  const errorOrTransactionHttp = error?.http ? error : transaction;
+  const errorOrTransactionUserAgent = error?.user_agent
+    ? error.user_agent
+    : transaction?.user_agent;
 
-  const errorUrl = error.error.page?.url || error.url?.full;
-  const method = error.http?.request?.method;
-  const status = error.http?.response?.status_code;
-  const userAgent = error?.user_agent;
+  // To get the error data needed for the summary we use the transaction fallback in case
+  // the error data is not available.
+  // In case of OTel the error data is not available in the error response and we need to use
+  // the associated root span data (which is called "transaction" here because of the APM data model).
+  const errorUrl = urlFromError || urlFromTransaction || buildUrl(errorOrTransactionUrl);
+  const method = errorOrTransactionHttp?.http?.request?.method;
+  const status = errorOrTransactionHttp?.http?.response?.status_code;
+  const userAgent = errorOrTransactionUserAgent;
   const environment = error.service.environment;
   const serviceVersion = error.service.version;
   const isUnhandled = error.error.exception?.[0]?.handled === false;
@@ -205,7 +217,7 @@ export function ErrorSampleDetails({
                 <EuiFlexItem>
                   <EuiIcon type="apmTrace" />
                 </EuiFlexItem>
-                <EuiFlexItem style={{ whiteSpace: 'nowrap' }}>
+                <EuiFlexItem css={{ whiteSpace: 'nowrap' }}>
                   {i18n.translate('xpack.apm.errorSampleDetails.viewOccurrencesInTraceExplorer', {
                     defaultMessage: 'Explore traces with this error',
                   })}
@@ -223,7 +235,7 @@ export function ErrorSampleDetails({
               <EuiFlexItem>
                 <EuiIcon type="discoverApp" />
               </EuiFlexItem>
-              <EuiFlexItem style={{ whiteSpace: 'nowrap' }}>
+              <EuiFlexItem css={{ whiteSpace: 'nowrap' }}>
                 {i18n.translate(
                   'xpack.apm.errorSampleDetails.viewOccurrencesInDiscoverButtonLabel',
                   {
@@ -247,7 +259,7 @@ export function ErrorSampleDetails({
         <Summary
           items={[
             <TimestampTooltip time={errorData ? error.timestamp.us / 1000 : 0} />,
-            errorUrl && method ? (
+            errorUrl ? (
               <HttpInfoSummaryItem url={errorUrl} method={method} status={status} />
             ) : null,
             userAgent?.name ? <UserAgentSummaryItem {...userAgent} /> : null,
diff --git a/x-pack/solutions/observability/plugins/apm/public/utils/build_url.test.ts b/x-pack/solutions/observability/plugins/apm/public/utils/build_url.test.ts
index 603fb536418fc..5b7e8ae27a176 100644
--- a/x-pack/solutions/observability/plugins/apm/public/utils/build_url.test.ts
+++ b/x-pack/solutions/observability/plugins/apm/public/utils/build_url.test.ts
@@ -5,8 +5,7 @@
  * 2.0.
  */
 
-import { buildUrl } from './build_url';
-import type { Transaction } from '../../typings/es_schemas/ui/transaction';
+import { type ItemType, buildUrl } from './build_url';
 
 describe('buildUrl', () => {
   it('should return a full URL when all fields are provided', () => {
@@ -20,7 +19,7 @@ describe('buildUrl', () => {
         port: 443,
       },
     };
-    const result = buildUrl(item as unknown as Transaction);
+    const result = buildUrl(item);
     expect(result).toBe('ftp://example.com:443/some/path');
   });
 
@@ -34,7 +33,7 @@ describe('buildUrl', () => {
         address: 'example.org',
       },
     };
-    const result = buildUrl(item as Transaction);
+    const result = buildUrl(item);
     expect(result).toBe('http://example.org/another/path');
   });
 
@@ -48,7 +47,7 @@ describe('buildUrl', () => {
         port: 8443,
       },
     };
-    const result = buildUrl(item as unknown as Transaction);
+    const result = buildUrl(item);
     expect(result).toBe('https://example.net:8443/');
   });
 
@@ -62,7 +61,7 @@ describe('buildUrl', () => {
         port: 8080,
       },
     };
-    const result = buildUrl(item as unknown as Transaction);
+    const result = buildUrl(item);
     expect(result).toBeUndefined();
   });
 
@@ -76,7 +75,7 @@ describe('buildUrl', () => {
         port: 8080,
       },
     };
-    const result = buildUrl(item as unknown as Transaction);
+    const result = buildUrl(item);
     expect(result).toBeUndefined();
   });
 
@@ -90,17 +89,17 @@ describe('buildUrl', () => {
       },
       server: {
         address: 'example.com',
-        port: 'invalid-port',
+        port: 'invalid', // Invalid port
       },
     };
 
-    const result = buildUrl(item as unknown as Transaction);
+    const result = buildUrl(item as unknown as ItemType);
 
     expect(result).toBeUndefined();
     expect(consoleErrorSpy).toHaveBeenCalledWith(
       'Failed to build URL',
       expect.objectContaining({
-        message: 'Invalid base URL: https://example.com:invalid-port',
+        message: 'Invalid base URL: https://example.com:invalid',
       })
     );
 
@@ -109,7 +108,7 @@ describe('buildUrl', () => {
 
   it('should handle an empty object gracefully', () => {
     const item = {};
-    const result = buildUrl(item as Transaction);
+    const result = buildUrl(item);
     expect(result).toBeUndefined();
   });
 });
diff --git a/x-pack/solutions/observability/plugins/apm/public/utils/build_url.ts b/x-pack/solutions/observability/plugins/apm/public/utils/build_url.ts
index 30f74fb58ac27..e5a16508a0d23 100644
--- a/x-pack/solutions/observability/plugins/apm/public/utils/build_url.ts
+++ b/x-pack/solutions/observability/plugins/apm/public/utils/build_url.ts
@@ -4,11 +4,18 @@
  * 2.0; you may not use this file except in compliance with the Elastic License
  * 2.0.
  */
-import type { Transaction } from '../../typings/es_schemas/ui/transaction';
-import type { Span } from '../../typings/es_schemas/ui/span';
-import type { APMError } from '../../typings/es_schemas/ui/apm_error';
+export interface ItemType {
+  url?: {
+    scheme?: string;
+    path?: string;
+  };
+  server?: {
+    address?: string;
+    port?: number;
+  };
+}
 
-export const buildUrl = (item: Transaction | Span | APMError) => {
+export const buildUrl = (item?: ItemType) => {
   // URL fields from Otel
   const urlScheme = item?.url?.scheme;
   const urlPath = item?.url?.path;
diff --git a/x-pack/solutions/observability/plugins/apm/server/routes/transactions/get_transaction/index.ts b/x-pack/solutions/observability/plugins/apm/server/routes/transactions/get_transaction/index.ts
index 858ed68556923..3926ca41c1367 100644
--- a/x-pack/solutions/observability/plugins/apm/server/routes/transactions/get_transaction/index.ts
+++ b/x-pack/solutions/observability/plugins/apm/server/routes/transactions/get_transaction/index.ts
@@ -128,6 +128,10 @@ export async function getTransaction({
 
   return {
     ...event,
+    server: {
+      ...event.server,
+      port: event.server?.port ? Number(event.server?.port) : undefined,
+    },
     transaction: {
       ...event.transaction,
       marks: source?.transaction?.marks,