Anticosti
Anticosti
Hmmm... the latest version available in my pro account, is: 3.4.14 
01. I had to revert from version 4.0.3 to 3.6.9 because when editing a CPT created with WPUF, it does not take me back to the page refreshed with the...
At first sight, I see an extra "," at this last line: "cc-cookiedisabled" : {}, Maybe, this is the culprit?
I am using "HashBar Pro - WordPress Notification Bar" ($10) https://codecanyon.net/item/hashbar-pro-wordpress-notification-bar/21301777 http://demo.wphash.com/hashbar/ This is what I added to my "wpm-config.json" file: You could check if this could fit your needs...?...
This one works prefect: https://wordpress.org/plugins/gdpr-cookie-compliance/
Try changing the plugin-name from: /wp-content/plugins/wp-multilang-master/ to: /wp-content/plugins/wp-multilang/
I would suspect this would happen if you are using one of the included WordPress themes. Sounds like if your custom "wpm-config.json" has been overwritten. hmmm... ? not sure...
I also encountered this issue. The only fix for now is to use the Classic Editor. This is an issue with Gutenberg.
With this configuration you should not have any problems. 
You are right VaLeXaR. Just tested and it works perfectly. :)