Hello Mr. Eray; You will need to re-enter your project. It is seen that you have not made any adjustments for the level where the floor is located in the floor general settings. Slabs are used for rigid diaphragm acceptance in the program and are important for earthquake effects. Please make adjustments from the floor general settings, even if it is a mezzanine floor in the project. Therefore, the analysis is problematic. The program should not be closed and necessary work will be done. However, for accurate results in the analysis, always apply the layer logic. Good work.