EntryToken example returning an error upon attempting to unlock

[hboon]

When running the TokenScript for our EntryToken example on Ethereum mainnet: 0x63cCEF733a093E5Bd773b41C96D3eCE361464942, it displays this after attempting to unlock after signing. Retrieving the challenge seems to work correctly:

Failed with: {"timestamp":1577940453791,"status":500,"error":"Internal Server Error","exception":"org.web3j.ens.EnsResolutionException","message":"Unable to determine sync status of node","path":"/api/checkSignature"}