Scheduling fails when no instruments available

[talister]

ERROR:astrometrics.sources_subs:{'non_field_errors': ["Invalid instrument type '1M0-SCICAM-SINISTRO' at site=cpt,enc=domb, tel=1m0a. \nValid instruments include: ."]}
[05/Dec/2022 23:53:22] ERROR Internal Server Error: /schedule/36254/confirm/
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner
response = get_response(request)
File "/usr/local/lib/python3.8/site-packages/django/core/handlers/base.py", line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python3.8/site-packages/django/contrib/auth/decorators.py", line 21, in _wrapped_view
return view_func(request, *args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/django/views/generic/base.py", line 70, in view
return self.dispatch(request, *args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/django/views/generic/base.py", line 98, in dispatch
return handler(request, *args, **kwargs)
File "/var/www/apps/neoexchange/core/views.py", line 1105, in post
return self.form_valid(form, request)
File "/var/www/apps/neoexchange/core/views.py", line 1121, in form_valid
tracking_num, sched_params = schedule_submit(new_form.cleaned_data, target, username)
File "/var/www/apps/neoexchange/core/views.py", line 1736, in schedule_submit
tracking_number, resp_params = submit_block_to_scheduler(body_elements, params)
File "/var/www/apps/neoexchange/astrometrics/sources_subs.py", line 2318, in submit_block_to_scheduler
for x in user_request['requests']:
KeyError: 'requests'