Runtime Error when executing alpha quartz block example

[BigHatChappy]

When I try to run the alpha quartz block example, or any example I run into this error

RuntimeError: You tried to modify a ParticleType object that is currently shared by multiple owners. 
Please explicitly request a mutable version of the data object by using the '_' notation or by calling 
make_mutable() on the parent object. See the documentation of the DataObject.make_mutable() method for 
further information.

I'm still very new to python and molecular modelling so any help is appreciated!