Merge branch '291-discrete-error-on-fresh-install-when-click-on-jobs' into 'django'

Resolve "(discrete) error on fresh install when click on "jobs""

Closes #291

See merge request !156

django/allgo/aio/__init__.py

@@ -662,7 +662,7 @@ class AllgoAio:
         """
 
         try:
-            job_ids = {int(x) for x in request.url.query.getall("id")}
+            job_ids = {int(x) for x in request.url.query.getall("id", ())}
             # limit the number of jobs in a single request
             if len(job_ids) > 20:
                 raise ValueError()