Merge pull request #2257 from FinnStutzenstein/Issue2249

No crash without a browser (fixes #2249)

openslides/utils/main.py

@@ -261,7 +261,11 @@ def start_browser(browser_url):
     Launches the default web browser at the given url and opens the
     webinterface.
     """
+    try:
         browser = webbrowser.get()
+    except webbrowser.Error:
+        print('Could not locate runnable browser: Skipping start')
+    else:
 
         def function():
             # TODO: Use a nonblocking sleep event here. Tornado has such features.