Unfortunately I also have a problem with the latest version of WordPress 5.4.2.
If the plugin is activated, I get the following error message when I create new posts:
Aktualisierung fehlgeschlagen. Die Antwort ist keine gültige JSON-Antwort.
Media don’t work and WordPress Health indicates:
Die REST-API hat den Abfrageparameter context nicht korrekt verarbeitet.
It would be great if you could solve the problem. I made a small donation to support the activities.
Thanks in advance!
Klaus