Keyur Kanade
Ansys Employee

Hello, 

The min orthogonal quality should be above 0.1 to proceed to solver. If it is less than 0.1 then please improve the mesh. 
First check the locations of the bad elements. Please see following video for the same. 
 
 
Once you have locations, please check if you can improve mesh using different mesh sizing. Please see following video. 
 
 
You can see more information about sizing at following link. 
https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v221/en/wb_msh/msh_Use_Adv_SF.html?q=sizing
 
If this does not help, you may need to check if you can use pinch control or virtual topology. 
 
 
If this does not help, please go to geometry and modify or simplify geometry at those locations in SpaceClaim.