Good Morning everyone, I need your help in this model. I modeled a simple concrete frame which acts as a support for a conveyor housing. But there is a warning showing that I have there is a zero stiffness problem. Need your help in this matter…

I created a model and analyzed. There are 0 errors, but 26 warnings. 24 warnings are "Zero Stiffness in Direction... at Joint... Eqn. No..." and the other two are "There were more than 12 DOF with zero stiffness". How can these warnings be resolved…