diff --git a/api/src/__test__/core/utils/misc/get-key-file.test.ts b/api/src/__test__/core/utils/misc/get-key-file.test.ts
index 12698aed3..e7f56dcc8 100644
--- a/api/src/__test__/core/utils/misc/get-key-file.test.ts
+++ b/api/src/__test__/core/utils/misc/get-key-file.test.ts
@@ -1,11 +1,12 @@
-import { expect, test } from 'vitest';
+import { expect, test, vi } from 'vitest';
 
 import { store } from '@app/store/index.js';
 import { FileLoadStatus, StateFileKey } from '@app/store/types.js';
 
-import '@app/core/utils/misc/get-key-file.js';
 import '@app/store/modules/emhttp.js';
 
+vi.mock('fs/promises');
+
 test('Before loading key returns null', async () => {
     const { getKeyFile } = await import('@app/core/utils/misc/get-key-file.js');
     const { status } = store.getState().registration;
@@ -48,21 +49,70 @@ test('Returns empty key if key location is empty', async () => {
     await expect(getKeyFile()).resolves.toBe('');
 });
 
-test(
-    'Returns decoded key file if key location exists',
-    async () => {
-        const { getKeyFile } = await import('@app/core/utils/misc/get-key-file.js');
-        const { loadStateFiles } = await import('@app/store/modules/emhttp.js');
-        const { loadRegistrationKey } = await import('@app/store/modules/registration.js');
-        // Load state files into store
-        await store.dispatch(loadStateFiles());
-        await store.dispatch(loadRegistrationKey());
-        // Check if store has state files loaded
-        const { status } = store.getState().registration;
-        expect(status).toBe(FileLoadStatus.LOADED);
-        await expect(getKeyFile()).resolves.toMatchInlineSnapshot(
-            '"hVs1tLjvC9FiiQsIwIQ7G1KszAcexf0IneThhnmf22SB0dGs5WzRkqMiSMmt2DtR5HOXFUD32YyxuzGeUXmky3zKpSu6xhZNKVg5atGM1OfvkzHBMldI3SeBLuUFSgejLbpNUMdTrbk64JJdbzle4O8wiQgkIpAMIGxeYLwLBD4zHBcfyzq40QnxG--HcX6j25eE0xqa2zWj-j0b0rCAXahJV2a3ySCbPzr1MvfPRTVb0rr7KJ-25R592hYrz4H7Sc1B3p0lr6QUxHE6o7bcYrWKDRtIVoZ8SMPpd1_0gzYIcl5GsDFzFumTXUh8NEnl0Q8hwW1YE-tRc6Y_rrvd7w"'
-        );
-    },
-    { timeout: 10000 }
-);
+test('Returns empty string when key file does not exist (ENOENT)', async () => {
+    const { readFile } = await import('fs/promises');
+
+    // Mock readFile to throw ENOENT error
+    const readFileMock = vi.mocked(readFile);
+    readFileMock.mockRejectedValueOnce(
+        Object.assign(new Error('ENOENT: no such file or directory'), { code: 'ENOENT' })
+    );
+
+    // Clear the module cache and re-import to get fresh module with mock
+    vi.resetModules();
+    const { getKeyFile } = await import('@app/core/utils/misc/get-key-file.js');
+    const { updateEmhttpState } = await import('@app/store/modules/emhttp.js');
+    const { store: freshStore } = await import('@app/store/index.js');
+
+    // Set key file location to a non-existent file
+    freshStore.dispatch(
+        updateEmhttpState({
+            field: StateFileKey.var,
+            state: {
+                regFile: '/boot/config/Pro.key',
+            },
+        })
+    );
+
+    // Should return empty string when file doesn't exist
+    await expect(getKeyFile()).resolves.toBe('');
+
+    // Clear mock
+    readFileMock.mockReset();
+    vi.resetModules();
+});
+
+test('Returns decoded key file if key location exists', async () => {
+    const { readFile } = await import('fs/promises');
+
+    // Mock a valid key file content
+    const mockKeyContent =
+        'hVs1tLjvC9FiiQsIwIQ7G1KszAcexf0IneThhnmf22SB0dGs5WzRkqMiSMmt2DtR5HOXFUD32YyxuzGeUXmky3zKpSu6xhZNKVg5atGM1OfvkzHBMldI3SeBLuUFSgejLbpNUMdTrbk64JJdbzle4O8wiQgkIpAMIGxeYLwLBD4zHBcfyzq40QnxG--HcX6j25eE0xqa2zWj-j0b0rCAXahJV2a3ySCbPzr1MvfPRTVb0rr7KJ-25R592hYrz4H7Sc1B3p0lr6QUxHE6o7bcYrWKDRtIVoZ8SMPpd1_0gzYIcl5GsDFzFumTXUh8NEnl0Q8hwW1YE-tRc6Y_rrvd7w==';
+    const binaryContent = Buffer.from(mockKeyContent, 'base64').toString('binary');
+
+    const readFileMock = vi.mocked(readFile);
+    readFileMock.mockResolvedValue(binaryContent);
+
+    // Clear the module cache and re-import to get fresh module with mock
+    vi.resetModules();
+    const { getKeyFile } = await import('@app/core/utils/misc/get-key-file.js');
+    const { loadStateFiles } = await import('@app/store/modules/emhttp.js');
+    const { loadRegistrationKey } = await import('@app/store/modules/registration.js');
+    const { store: freshStore } = await import('@app/store/index.js');
+
+    // Load state files into store
+    await freshStore.dispatch(loadStateFiles());
+    await freshStore.dispatch(loadRegistrationKey());
+    // Check if store has state files loaded
+    const { status } = freshStore.getState().registration;
+    expect(status).toBe(FileLoadStatus.LOADED);
+
+    const result = await getKeyFile();
+    expect(result).toBe(
+        'hVs1tLjvC9FiiQsIwIQ7G1KszAcexf0IneThhnmf22SB0dGs5WzRkqMiSMmt2DtR5HOXFUD32YyxuzGeUXmky3zKpSu6xhZNKVg5atGM1OfvkzHBMldI3SeBLuUFSgejLbpNUMdTrbk64JJdbzle4O8wiQgkIpAMIGxeYLwLBD4zHBcfyzq40QnxG--HcX6j25eE0xqa2zWj-j0b0rCAXahJV2a3ySCbPzr1MvfPRTVb0rr7KJ-25R592hYrz4H7Sc1B3p0lr6QUxHE6o7bcYrWKDRtIVoZ8SMPpd1_0gzYIcl5GsDFzFumTXUh8NEnl0Q8hwW1YE-tRc6Y_rrvd7w'
+    );
+
+    // Clear mock
+    readFileMock.mockReset();
+    vi.resetModules();
+}, 10000);
diff --git a/api/src/core/utils/misc/get-key-file.ts b/api/src/core/utils/misc/get-key-file.ts
index 55cd139c9..941f29521 100644
--- a/api/src/core/utils/misc/get-key-file.ts
+++ b/api/src/core/utils/misc/get-key-file.ts
@@ -16,11 +16,22 @@ export const getKeyFile = async function (appStore: RootState = store.getState()
 
     const keyFileName = basename(emhttp.var?.regFile);
     const registrationKeyFilePath = join(paths['keyfile-base'], keyFileName);
-    const keyFile = await readFile(registrationKeyFilePath, 'binary');
-    return Buffer.from(keyFile, 'binary')
-        .toString('base64')
-        .trim()
-        .replace(/\+/g, '-')
-        .replace(/\//g, '_')
-        .replace(/=/g, '');
+
+    try {
+        const keyFile = await readFile(registrationKeyFilePath, 'binary');
+        return Buffer.from(keyFile, 'binary')
+            .toString('base64')
+            .trim()
+            .replace(/\+/g, '-')
+            .replace(/\//g, '_')
+            .replace(/=/g, '');
+    } catch (error) {
+        // Handle ENOENT error when Pro.key file doesn't exist
+        if (error instanceof Error && 'code' in error && error.code === 'ENOENT') {
+            // Return empty string when key file is missing (ENOKEYFILE state)
+            return '';
+        }
+        // Re-throw other errors
+        throw error;
+    }
 };