The first to call is the app developer. Another option is to ask the company that manages and hosts your WordPress site. I host my WP with - https://www.hostcolor.com/webhosting/managed-web-hosting.html - and they fix all issues for me. Contact them they'd help. Alternatively, you'd always go to WordPress.org and check discussions.
Topic:
App Store Distribution & Marketing
SubTopic:
General
Tags: