TypeError: Cannot assign to read only property 'toString' of object '#<t>'

[smahaffey]

View details in Rollbar: https://app.rollbar.com/a/smahaffey/fix/item/PhenogenCloud/972

TypeError: Cannot assign to read only property 'toString' of object '#<t>'
  File "https://connect.facebook.net/en_US/sdk.js", line 105, in [anonymous]
  File "https://connect.facebook.net/en_US/sdk.js", line 105, in Object.<anonymous>
  File "https://connect.facebook.net/en_US/sdk.js", line 24, in c
  File "https://connect.facebook.net/en_US/sdk.js", line 24, in m
  File "https://connect.facebook.net/en_US/sdk.js", line 106, in Object.<anonymous>
  File "https://connect.facebook.net/en_US/sdk.js", line 24, in c
  File "https://connect.facebook.net/en_US/sdk.js", line 24, in m
  File "https://connect.facebook.net/en_US/sdk.js", line 167, in a.process
  File "https://connect.facebook.net/en_US/sdk.js", line 172, in a
  File "https://connect.facebook.net/en_US/sdk.js", line 172, in [anonymous]
  File "https://connect.facebook.net/en_US/sdk.js", line 172, in f
  File "https://connect.facebook.net/en_US/sdk.js", line 172, in parse
  File "https://connect.facebook.net/en_US/sdk.js", line 51, in s