diff --git a/package-lock.json b/package-lock.json
index 83e5fcb..7706f70 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,7 +24,6 @@
         "@typescript-eslint/eslint-plugin": "^5.31.0",
         "@typescript-eslint/parser": "^5.31.0",
         "@vitejs/plugin-react": "^2.0.0",
-        "@vitest/ui": "^0.20.3",
         "autoprefixer": "^10.4.8",
         "eslint": "^8.20.0",
         "eslint-config-standard": "^17.0.0",
@@ -731,12 +730,6 @@
         "node": ">= 8"
       }
     },
-    "node_modules/@polka/url": {
-      "version": "1.0.0-next.21",
-      "resolved": "https://registry.npmjs.org/@polka/url/-/url-1.0.0-next.21.tgz",
-      "integrity": "sha512-a5Sab1C4/icpTZVzZc5Ghpz88yQtGOyNqYXcZgOssB2uuAr+wF/MvN6bgtW32q7HHrvBki+BsZ0OuNv6EV3K9g==",
-      "dev": true
-    },
     "node_modules/@sinclair/typebox": {
       "version": "0.24.26",
       "resolved": "https://registry.npmjs.org/@sinclair/typebox/-/typebox-0.24.26.tgz",
@@ -1298,15 +1291,6 @@
         "vite": "^3.0.0"
       }
     },
-    "node_modules/@vitest/ui": {
-      "version": "0.20.3",
-      "resolved": "https://registry.npmjs.org/@vitest/ui/-/ui-0.20.3.tgz",
-      "integrity": "sha512-Rlg+y3PtE5IcGPVmViF/BXM7euY7LG0yjfIvXKlF0L3OnNSVS8+esgLlAhaYftSJXtcunqa/cYXiQ+qFVTaBGw==",
-      "dev": true,
-      "dependencies": {
-        "sirv": "^2.0.2"
-      }
-    },
     "node_modules/abab": {
       "version": "2.0.6",
       "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.6.tgz",
@@ -4479,15 +4463,6 @@
       "integrity": "sha512-Jsjnk4bw3YJqYzbdyBiNsPWHPfO++UGG749Cxs6peCu5Xg4nrena6OVxOYxrQTqww0Jmwt+Ref8rggumkTLz9Q==",
       "dev": true
     },
-    "node_modules/mrmime": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/mrmime/-/mrmime-1.0.1.tgz",
-      "integrity": "sha512-hzzEagAgDyoU1Q6yg5uI+AorQgdvMCur3FcKf7NhMKWsaYg+RnbTyHRa/9IlLF9rf455MOCtcqqrQQ83pPP7Uw==",
-      "dev": true,
-      "engines": {
-        "node": ">=10"
-      }
-    },
     "node_modules/ms": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
@@ -5367,20 +5342,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/sirv": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/sirv/-/sirv-2.0.2.tgz",
-      "integrity": "sha512-4Qog6aE29nIjAOKe/wowFTxOdmbEZKb+3tsLljaBRzJwtqto0BChD2zzH0LhgCSXiI+V7X+Y45v14wBZQ1TK3w==",
-      "dev": true,
-      "dependencies": {
-        "@polka/url": "^1.0.0-next.20",
-        "mrmime": "^1.0.0",
-        "totalist": "^3.0.0"
-      },
-      "engines": {
-        "node": ">= 10"
-      }
-    },
     "node_modules/slash": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
@@ -5652,15 +5613,6 @@
         "node": ">=8.0"
       }
     },
-    "node_modules/totalist": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/totalist/-/totalist-3.0.0.tgz",
-      "integrity": "sha512-eM+pCBxXO/njtF7vdFsHuqb+ElbxqtI4r5EAvk6grfAFyJ6IvWlSkfZ5T9ozC6xWw3Fj1fGoSmrl0gUs46JVIw==",
-      "dev": true,
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/tough-cookie": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-4.0.0.tgz",
@@ -6676,12 +6628,6 @@
         "fastq": "^1.6.0"
       }
     },
-    "@polka/url": {
-      "version": "1.0.0-next.21",
-      "resolved": "https://registry.npmjs.org/@polka/url/-/url-1.0.0-next.21.tgz",
-      "integrity": "sha512-a5Sab1C4/icpTZVzZc5Ghpz88yQtGOyNqYXcZgOssB2uuAr+wF/MvN6bgtW32q7HHrvBki+BsZ0OuNv6EV3K9g==",
-      "dev": true
-    },
     "@sinclair/typebox": {
       "version": "0.24.26",
       "resolved": "https://registry.npmjs.org/@sinclair/typebox/-/typebox-0.24.26.tgz",
@@ -7082,15 +7028,6 @@
         "react-refresh": "^0.14.0"
       }
     },
-    "@vitest/ui": {
-      "version": "0.20.3",
-      "resolved": "https://registry.npmjs.org/@vitest/ui/-/ui-0.20.3.tgz",
-      "integrity": "sha512-Rlg+y3PtE5IcGPVmViF/BXM7euY7LG0yjfIvXKlF0L3OnNSVS8+esgLlAhaYftSJXtcunqa/cYXiQ+qFVTaBGw==",
-      "dev": true,
-      "requires": {
-        "sirv": "^2.0.2"
-      }
-    },
     "abab": {
       "version": "2.0.6",
       "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.6.tgz",
@@ -9336,12 +9273,6 @@
       "integrity": "sha512-Jsjnk4bw3YJqYzbdyBiNsPWHPfO++UGG749Cxs6peCu5Xg4nrena6OVxOYxrQTqww0Jmwt+Ref8rggumkTLz9Q==",
       "dev": true
     },
-    "mrmime": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/mrmime/-/mrmime-1.0.1.tgz",
-      "integrity": "sha512-hzzEagAgDyoU1Q6yg5uI+AorQgdvMCur3FcKf7NhMKWsaYg+RnbTyHRa/9IlLF9rf455MOCtcqqrQQ83pPP7Uw==",
-      "dev": true
-    },
     "ms": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
@@ -9943,17 +9874,6 @@
         "object-inspect": "^1.9.0"
       }
     },
-    "sirv": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/sirv/-/sirv-2.0.2.tgz",
-      "integrity": "sha512-4Qog6aE29nIjAOKe/wowFTxOdmbEZKb+3tsLljaBRzJwtqto0BChD2zzH0LhgCSXiI+V7X+Y45v14wBZQ1TK3w==",
-      "dev": true,
-      "requires": {
-        "@polka/url": "^1.0.0-next.20",
-        "mrmime": "^1.0.0",
-        "totalist": "^3.0.0"
-      }
-    },
     "slash": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
@@ -10164,12 +10084,6 @@
         "is-number": "^7.0.0"
       }
     },
-    "totalist": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/totalist/-/totalist-3.0.0.tgz",
-      "integrity": "sha512-eM+pCBxXO/njtF7vdFsHuqb+ElbxqtI4r5EAvk6grfAFyJ6IvWlSkfZ5T9ozC6xWw3Fj1fGoSmrl0gUs46JVIw==",
-      "dev": true
-    },
     "tough-cookie": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-4.0.0.tgz",
diff --git a/package.json b/package.json
index 149d76f..e8b097f 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,6 @@
     "@typescript-eslint/eslint-plugin": "^5.31.0",
     "@typescript-eslint/parser": "^5.31.0",
     "@vitejs/plugin-react": "^2.0.0",
-    "@vitest/ui": "^0.20.3",
     "autoprefixer": "^10.4.8",
     "eslint": "^8.20.0",
     "eslint-config-standard": "^17.0.0",
diff --git a/src/App.tsx b/src/App.tsx
index ee638f9..3f5541a 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -127,6 +127,7 @@ export class App extends React.Component<IAppProps> {
  */
 export async function fetchConfiguration(): Promise<Configuration> {
   const url = `${import.meta.env.VITE_API_URL}`;
+
   // The test library cannot use the Fetch API
   // @ts-ignore
   if (window.fetch) {
@@ -137,13 +138,15 @@ export async function fetchConfiguration(): Promise<Configuration> {
         response.json()
       ) as Configuration;
   }
-  return new Promise((resolve) => {
+
+  return new Promise((resolve, reject) => {
     const xhr = new XMLHttpRequest();
     xhr.open('POST', url, true);
     xhr.onreadystatechange = function() { // Call a function when the state changes.
       if (xhr.readyState === XMLHttpRequest.DONE && xhr.status === 200) {
         resolve(JSON.parse(this.responseText));
       }
+      reject(xhr.responseText);
     };
     xhr.send();
   });