I’ve tried everything suggested in previous support posts and nothing seems to work. How do I fix this? I’ve included login credentials in the private content section.
I tried to check the API key you used on my local server and it works fine, tested a few working API keys on your site and it’s not working.
I think the issue maybe coming from one of your plugins, I think it might be wordfence however since your site is live it’s not a good idea to disable it.
Can you try to create a staging site? here’s a tutorial that you can follow: https://themeisle.com/blog/wordpress-staging-site/
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