Hello, I ran a simulation and I’m not having any problems. This is how I did it:
You already created a sphere and a plane object and positioned over the sphere.
Then you create a cloth collection.
Then you click on the plane/cloth and got to the modifier tab and select reactor cloth.
Then you click on the cloth collection icon and add the plane/cloth
Then select the sphere and open the property editor on the reactor side bar.
A window pops up and there should be 3 tabs: Physical properties - Simulation Geometry - and display. In simulation Geometry, mesh convex hull should be checked. In physical properties, unyielding should be checked. Everything else stays the same. Close the dialoge out and run your simulation. I hope this helps you.