Invalid JSON response

This is not helpful at all please submit more information. What you have done, what the error is, what possible conflicts you have in your install, what you expected to happen, etc… Please read through this article before reposting https://www.wpbeginner.com/beginners-guide/how-to-properly-ask-for-wordpress-support-and-get-it/

Please try updating to 1.1.3 I may have resolved this from a Github issue