@takayukister thanks for your answer. I configure a theme-child but I don’t know how to edit the stylesheet file’s plugin, because the theme-child don’t have the folder “plugins”.
Also, I uninstall and install the plugin again but I continue the same errors.
I read the link you tell me but I don’t know what is the error and I did already the child theme.
Right now I’m a bit lost on how I can fix the problem.