diff --git a/README.md b/README.md
index 9d02d181d..cb09f70fa 100644
--- a/README.md
+++ b/README.md
@@ -70,25 +70,25 @@ Jan is an open-source ChatGPT alternative that runs 100% offline on your compute
   <tr style="text-align:center">
     <td style="text-align:center"><b>Experimental (Nightly Build)</b></td>
     <td style="text-align:center">
-      <a href='https://delta.jan.ai/0.4.3-124/jan-win-x64-0.4.3-124.exe'>
+      <a href='https://delta.jan.ai/0.4.3-126/jan-win-x64-0.4.3-126.exe'>
         <img src='./docs/static/img/windows.png' style="height:14px; width: 14px" />
         <b>jan.exe</b>
       </a>
     </td>
     <td style="text-align:center">
-      <a href='https://delta.jan.ai/0.4.3-124/jan-mac-x64-0.4.3-124.dmg'>
+      <a href='https://delta.jan.ai/0.4.3-126/jan-mac-x64-0.4.3-126.dmg'>
         <img src='./docs/static/img/mac.png' style="height:15px; width: 15px" />
         <b>Intel</b>
       </a>
     </td>
     <td style="text-align:center">
-      <a href='https://delta.jan.ai/0.4.3-124/jan-mac-arm64-0.4.3-124.dmg'>
+      <a href='https://delta.jan.ai/0.4.3-126/jan-mac-arm64-0.4.3-126.dmg'>
         <img src='./docs/static/img/mac.png' style="height:15px; width: 15px" />
         <b>M1/M2</b>
       </a>
     </td>
     <td style="text-align:center">
-      <a href='https://delta.jan.ai/0.4.3-124/jan-linux-amd64-0.4.3-124.deb'>
+      <a href='https://delta.jan.ai/0.4.3-126/jan-linux-amd64-0.4.3-126.deb'>
         <img src='./docs/static/img/linux.png' style="height:14px; width: 14px" />
         <b>jan.deb</b>
       </a>
diff --git a/core/src/node/api/common/builder.ts b/core/src/node/api/common/builder.ts
index 4081e859f..54ce9159f 100644
--- a/core/src/node/api/common/builder.ts
+++ b/core/src/node/api/common/builder.ts
@@ -14,14 +14,13 @@ const path = join(os.homedir(), 'jan')
 
 export const getBuilder = async (configuration: RouteConfiguration) => {
   const directoryPath = join(path, configuration.dirName)
-
   try {
-    if (!(await fs.existsSync(directoryPath))) {
+    if (!fs.existsSync(directoryPath)) {
       console.debug('model folder not found')
       return []
     }
 
-    const files: string[] = await fs.readdirSync(directoryPath)
+    const files: string[] = fs.readdirSync(directoryPath)
 
     const allDirectories: string[] = []
     for (const file of files) {
@@ -29,12 +28,12 @@ export const getBuilder = async (configuration: RouteConfiguration) => {
       allDirectories.push(file)
     }
 
-    const readJsonPromises = allDirectories.map(async (dirName) => {
-      const jsonPath = join(directoryPath, dirName, configuration.metadataFileName)
-      return await readModelMetadata(jsonPath)
-    })
-
-    const results = await Promise.all(readJsonPromises)
+    const results = allDirectories
+      .map((dirName) => {
+        const jsonPath = join(directoryPath, dirName, configuration.metadataFileName)
+        return readModelMetadata(jsonPath)
+      })
+      .filter((data) => !!data)
     const modelData = results
       .map((result: any) => {
         try {
@@ -52,8 +51,12 @@ export const getBuilder = async (configuration: RouteConfiguration) => {
   }
 }
 
-const readModelMetadata = async (path: string) => {
-  return fs.readFileSync(path, 'utf-8')
+const readModelMetadata = (path: string): string | undefined => {
+  if (fs.existsSync(path)) {
+    return fs.readFileSync(path, 'utf-8')
+  } else {
+    return undefined
+  }
 }
 
 export const retrieveBuilder = async (configuration: RouteConfiguration, id: string) => {
@@ -99,7 +102,7 @@ export const getMessages = async (threadId: string) => {
   const threadDirPath = join(path, 'threads', threadId)
   const messageFile = 'messages.jsonl'
   try {
-    const files: string[] = await fs.readdirSync(threadDirPath)
+    const files: string[] = fs.readdirSync(threadDirPath)
     if (!files.includes(messageFile)) {
       throw Error(`${threadDirPath} not contains message file`)
     }