We have released Zcoin v0.13.8.2 which is a mandatory update (even if you’re on 0.13.8.1). We had to do a parameter change to a Sigma building block to ensure the public can verify that it was generated randomly.
Note the new hard fork date on the 30 July!
https://zcoin.io/zcoin-sigma-mandatory-update-13-8-2-and-activation-on-30-july/