You'll need to make sure the source object's axis is aligned to the target object correctly: This is explained in the 'Tips and Troubleshooting' section of the documentation here, along with instructions on how to fix the error. 

Don't hesitate to get in touch if you are having issues by logging into Blender Market and clicking the 'Contact Creator' button on my Store Page or by emailing [email protected].

You can either contact me by logging into Blender Market and clicking the 'Contact Creator' button on my Store Page or by emailing [email protected].

For tips and troubleshooting, go to https://conform-object-docs.readthedocs.io/en/latest/troubleshooting.html/

Full documentation can be found at https://conform-object-docs.readthedocs.io/