g955n 8.0 u3 Patch Certificate problem

sir i m facing g955n 8.0 u3 Patch Certificate problem here is my job id
#67547812 Jul 26, 2019 Samsung Samsung Galaxy S8+ Patch Certificate Finished
i m tried also manual and chimera tool root but i after finish process chimera says if signal not done try another root plz help me to solve my problem
my chimera id.mirshad82