Error: Network error: Unexpected token < in JSON at position 0
    at new ApolloError (/service/node_modules/apollo-client/bundle.umd.js:92:26)
    at /service/node_modules/apollo-client/bundle.umd.js:1588:34
    at /service/node_modules/apollo-client/bundle.umd.js:2008:15
    at Set.forEach ()
    at /service/node_modules/apollo-client/bundle.umd.js:2006:26
    at Map.forEach ()
    at QueryManager.broadcastQueries (/service/node_modules/apollo-client/bundle.umd.js:2004:20)
    at /service/node_modules/apollo-client/bundle.umd.js:1483:29
    at process._tickCallback (internal/process/next_tick.js:68:7)