AS4QGIS can be downloaded via this Google Drive link. The folder 'AS4QGIS' contains 5 subfolders. To ensure that the algorithm pipeline works, at least one of the provided models and the folder 'styles' are required.
models | contains the '.model3' algorithm pipelines. Archimedes (non stylized and enhanced), Chronos (non stylized and enhanced), and Chimaira (non stylized and enhanced).
styles | Contains the required style files for the enhanced '.model3' versions.
In the QGIS processing toolbox click on 'models' and 'add model to processing toolbox...'. Navigate to the downloaded model version variation of AS4QGIS Archimedes, Chronos, or Chimaira and add it.
In the Processing Toolbox, Right-click the model and choose 'Edit Rendering Styles for Outputs...'.
A Pop-up will appear. Click the button '(...)'.
Navigate to your previously saved '.qml'-style files.
Once the file path has been set, the style folder should not be moved. Otherwise, the file path must be set again.
The styles-folder is downloadable via the google drive-link or via github.
for polygons.shp choose AS4QGIS_polygonstyle.qml
for polylines.shp choose AS4QGIS_polylinestyle.qml
for vertices.shp choose AS4QGIS_pointstyles.qml
for pointdata.shp also choose AS4QGIS_pointstyles.qml
Your output files are now styled.