the rating value field cannot be empty

Hello,

Google give me the message :

Field missing : author
Field missins : updated

When I use :

https://developers.google.com/structured-data/testing-tool/?url=http://www.guerisonspirituelle.com/

I saw that the problem is on the testimonials as you can see by yourself it is written : “the rating value field cannot be empty”

Could you tell me how to fix the problem ?

Thank you (except this problem your plugin is great :-))

https://ww.wp.xz.cn/plugins/testimonials-widget/