Loading new gplates velocity file did not succeed

Hi guys,
I am now using ASPECT 2.2.0 to run 3D models using gplates boundary velocities.
However, I met a problem, which showed ‘Loading new gplates velocity file did not succeed. Assuming constant boundary conditions for rest of model run.’
The example provided in the cookbook also cannot be loaded successfully.
I did not know why? Is there something wrong with my MacBook Pro environment?

Many thanks,
Xubo

I think I have known the meaning of the message “Loading new gplates velocity file did not succeed. Assuming constant boundary conditions for rest of model run” after I read gplates.cc.