export as png threw an error
maybe the canvas to export were to big? As not each export as png returns error.
url: https://pdmap.uni.lu/minerva/api/projects/pd_map_winter_22/models/4932:downloadImage?backgroundOverlayId=15068&handlerClass=lcsb.mapviewer.converter.graphics.PngImageGenerator&polygonString=0,0;25866.163441610704,0;25866.163441610704,13503;0,13503;&zoomLevel=4&
export error: {"reason":"Handler dispatch failed; nested exception is java.awt.AWTError: Assistive Technology not found: org.GNOME.Accessibility.AtkWrapper","error":"Internal server error."}