Hi Shane,
I have disabled every plugins and switched to 2019 theme.
Then I activate Toolsets plugins (Types, Views, Forms and Maps) and when I try to save one Form (CRED)
the console returns me this error (attachment file)..
Please help me..
I've resolved the issue from myself.
In production, I've exported the theme's settings and created a child theme starting from the installed theme in the site.
After that, I've imported in the child theme the parent theme's settings for prevent to lost the custom CSS.
So, I tried to create the form with Toolset CRED. The issues and the errors still remain in the console, but the form was created and finally works!