Errors

ZBRENT: fatal error in bracketing

 curvature:   0.00 expect dE= 0.000E+00 dE for cont linesearch  0.000E+00
 ZBRENT: fatal error in bracketing
     please rerun with smaller EDIFF, or copy CONTCAR
     to POSCAR and continue

改用IBRON=1

Warnings

WARNING in EDDRMM: call to ZHEGV failed

• The RMM-DIIS diagonalisation algorithm is not stable for your specific setup of the calculation.
• Maybe input geometry was not reasonable