Wordpress: admin back-end => Settings: Permalinks => Click "Save Changes"
Other method:
https://drewl.com/blog/fix-wordpress-rest-api-errors/
“An unexpected network error has occur” | WordPress.org
Wordpress: admin back-end => Settings: Permalinks => Click "Save Changes"
Other method:
https://drewl.com/blog/fix-wordpress-rest-api-errors/
“An unexpected network error has occur” | WordPress.org