diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b52e160a..afddea82 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,7 +42,7 @@ jobs:
     - run: npm run jestTest -- -t ${{ matrix.mcVersion }}
     - uses: actions/upload-artifact@v4
       with:
-        name: test_picture-${{ github.run_id }}-${{ github.job }}
+        name: test_picture
         path: test/test_*.png
   DeployPages:
     runs-on: ubuntu-latest
@@ -57,7 +57,7 @@ jobs:
       - name: Download build
         uses: actions/download-artifact@v4.1.7
         with:
-          name: test_picture-${{ github.run_id }}-${{ github.job }}
+          name: test_picture
       - name: Create commits
         run: |
           git config user.name 'rom1504bot'
diff --git a/viewer/prerender.js b/viewer/prerender.js
index 8f525adb..c5d6a385 100644
--- a/viewer/prerender.js
+++ b/viewer/prerender.js
@@ -18,7 +18,15 @@ const supportedVersions = require('./lib/version').supportedVersions
 
 for (const version of supportedVersions) {
   const assets = mcAssets(version)
+  // Check if assets is null or undefined
+  if (!assets) {
+    console.log('Error: assets is null or undefined')
+  }
   const atlas = makeTextureAtlas(assets)
+  // Check if atlas is null or undefined
+  if (!atlas) {
+    console.log('Error: atlas is null or undefined')
+  }
   const out = fs.createWriteStream(path.resolve(texturesPath, version + '.png'))
   const stream = atlas.canvas.pngStream()
   stream.on('data', (chunk) => out.write(chunk))