diff --git a/.github/workflows/develop.yml b/.github/workflows/develop.yml
index b80ae44fa..e8fe1a88e 100644
--- a/.github/workflows/develop.yml
+++ b/.github/workflows/develop.yml
@@ -10,13 +10,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x]
+        node-version: [14.x]
         python-version: [3.0]
     env:
       S3_BUCKET_PREFIX: hackingstudio-code4maus-projects
       AWS_REGION: eu-central-1
       AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
       AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+      SLS_DEBUG: true
     steps:
       - name: Checkout app
         uses: actions/checkout@v3
diff --git a/.github/workflows/production.yml b/.github/workflows/production.yml
index eb731ba7f..fc94b9546 100644
--- a/.github/workflows/production.yml
+++ b/.github/workflows/production.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x]
+        node-version: [14.x]
         python-version: [3.0]
     env:
       BRANCH: production
diff --git a/package.json b/package.json
index b0098a109..cfe0ef995 100644
--- a/package.json
+++ b/package.json
@@ -133,7 +133,7 @@
     "scratch-storage": "1.2.2",
     "scratch-svg-renderer": "0.2.0-prerelease.20210511195415",
     "selenium-webdriver": "4.0.0-alpha.1",
-    "serverless": "^1.30.3",
+    "serverless": "^1.83.3",
     "serverless-domain-manager": "^3.1.0",
     "serverless-dotenv-plugin": "^2.0.1",
     "serverless-offline": "^4.9.2",
diff --git a/serverless.yml b/serverless.yml
index 19ffceaee..f7047d85e 100644
--- a/serverless.yml
+++ b/serverless.yml
@@ -2,7 +2,7 @@ service: hackingstudio-code4maus
 
 provider:
   name: aws
-  runtime: nodejs18.x
+  runtime: nodejs14.x
   region: eu-central-1
   role: 'arn:aws:iam::#{AWS::AccountId}:role/hackingstudio/code4maus/hackingstudio-code4maus-functions'
   stage: ${file(scripts/env.js):stage}
diff --git a/src/backend/prepareAssetUpload.js b/src/backend/prepareAssetUpload.js
index 8de0f7dd1..9efd1364e 100644
--- a/src/backend/prepareAssetUpload.js
+++ b/src/backend/prepareAssetUpload.js
@@ -10,6 +10,8 @@ const s3 = initS3(customEndpoint)
 export const handler = async (event) => {
   const { filename } = JSON.parse(event.body)
 
+  console.log("filename for handler", filename)
+
   if (!filename) {
     return respond.error(400, "Missing request body key 'filename'.")
   }
@@ -19,6 +21,8 @@ export const handler = async (event) => {
     Key: `data/assets/${filename}`,
   }
 
+  console.log("params", params)
+
   try {
     await s3.headObject(params).promise()
     return respond.error(409, 'Asset already exists.', { exists: true })
diff --git a/src/lib/project-save-hoc.jsx b/src/lib/project-save-hoc.jsx
index dfddb5b5c..03ec9cf23 100644
--- a/src/lib/project-save-hoc.jsx
+++ b/src/lib/project-save-hoc.jsx
@@ -76,6 +76,7 @@ const ProjectSaveHOC = (WrappedComponent) => {
         await this.saveMeta()
       } catch (e) {
         if (!this.requestCancelSave) {
+          console.warn("error in saving:", e)
           errPromise = this.setError('Das hat leider nicht geklappt')
         } else {
           errPromise = Promise.reject()
@@ -107,8 +108,10 @@ const ProjectSaveHOC = (WrappedComponent) => {
                 filename: asset.fileName,
               }),
             })
+            
             if (!res.ok && res.status !== 409) {
-              throw new Error(`uploading an asset failed: ${asset.filename}`)
+              console.warn("save assets error response", res)
+              throw new Error(`uploading an asset failed: ${asset.fileName}`)
             }
 
             const body = await res.json()