think this would work

.gitea/workflows/run-mucapy.yml

@@ -30,7 +30,9 @@ jobs:
       - name: Build executable with PyInstaller
         run: |
           pyinstaller --onefile --windowed mucapy/main.py \
-            --add-data "mucapy/styling:styling"
+            --add-data "mucapy/styling:styling" \
+            --add-data "mucapy/models:models"
+
 
       - name: Upload executable artifact
         uses: actions/upload-artifact@v3

mucapy/main.py

@@ -857,7 +857,7 @@ class AboutWindow(QDialog):
         layout.addWidget(close_btn, alignment=Qt.AlignCenter)
 
         # Set Styling for About Section
-        style_file = getpath.resource_path("mucapy/styling/about.qss")
+        style_file = getpath.resource_path("styling/about.qss")
         with open(style_file,"r") as aboutstyle:
             self.setStyleSheet(aboutstyle.read())