@TIG Thank you for your help！
My problem solved because my computer's name have non-ASCII characters.
thank you！

@Rich-O-Brien
I have purchased curviloft, but I encounter a problem with A04. How to solve it?

Fredo6 Plugins Information on 2024-05-03 18:38:51 +0800

• Platform: x64-mswin64_140 - Ruby: 2.7.2
• Sketchup: 23.0.397
• LibFredo6: v14.3d
• LibFredo6 Binary loaded
• Sketchucation ExtensionStore: 4.4.1
• SCFLicense: v6.4a - 74
• Fredo6 Plugins

  Curviloft v1.9b
  JointPushPull v4.4e

• SCFLicense directory present

  Signature File: 2024-05-03 18:31:59 +0800