VMTK library is not found

I have a problem when I try to use VMTK(my vision is 4.11.0-2020-05-27 r29081 / abc9bd3
) to extract centerline.When I try to apply,it signals an error as"VMTK library is not found",and the detail is as follow.微信图片_20200708223001 .

This sounds like an issue with the installation. Can you try installing the current slicer preview version and vmtk extension and let us know. If it is broken, use the Help->Report a bug menu item to post the log file.

I will do that. Thanks for the tip~