What do you mean, there is stumbling resistance?

Encounter difficulties or obstacles in a process or plan, resulting in things not progressing smoothly. "Stumbling" refers to walking unsteadily, or stuttering or pausing in language communication; "Resistance" refers to the force that hinders or restricts progress or development; "Not smooth" means not smooth and not satisfactory, so the phrase "stumbling is not smooth" means that things are not going smoothly because of difficulties or obstacles in a certain process or plan.