Problems in 3D simulation with phase field method

Hi, everyone!

I am working on droplet coalescence on superhydrophobic surface. I would like to simulate the 3D coalesce process through the "laminar two-phase flow, phase field" module. But during the simulation, I encountered the following problem,

"Failed to find consistent initial values
Undefined value found Linsolv
NaN or Inf found when solving linear system using SOR
Last time step is not converged
- Feature: Time-Dependent Solver 1 (sol1/t1)"

I am new in using comsol, would you help me to solve this problem.

Thanks in advance!

Yh