Starting today you may see the following messages piling up in your logs:
2018-08-24 14:57:15 quantrocket.account: ERROR error fetching exchange rates, will try again shortly: Expecting value: line 1 column 1 (char 0)
2018-08-24 14:58:46 quantrocket.account: ERROR error fetching exchange rates, will try again shortly: Expecting value: line 1 column 1 (char 0)
2018-08-24 15:00:15 quantrocket.account: ERROR error fetching exchange rates, will try again shortly: Expecting value: line 1 column 1 (char 0)
The upstream URL changed for one of the endpoints from which the account service queries exchange rates, exchangeratesapi.io. The issue has been patched in quantrocket/account:1.2.1, please update to that version.