fix: log exception if we can't get the event loop

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2341>

api/funkwhale_api/federation/jsonld.py

@@ -1,5 +1,6 @@
 import asyncio
 import functools
+import logging
 
 import aiohttp
 import pyld.documentloader.requests
@@ -10,6 +11,8 @@ from rest_framework.fields import empty
 
 from . import contexts
 
+logger = logging.getLogger(__name__)
+
 
 def cached_contexts(loader):
     functools.wraps(loader)
@@ -282,7 +285,8 @@ class JsonLdSerializer(serializers.Serializer):
             if dereferenced_ids:
                 try:
                     loop = asyncio.get_event_loop()
-                except RuntimeError:
+                except RuntimeError as exception:
+                    logger.debug(exception)
                     loop = asyncio.new_event_loop()
                 references = self.context.setdefault("references", {})
                 loop.run_until_complete(