It turns our this error is caused by security software on the server. Meaning that a software that makes sure the hosting providers servers are safe is denying these requests.
You cannot fix this because it’s on the hosting providers server, you have to call or email them and let them know this is happening.
I did they and they looked into it and told me there was a bug that was causing this error. They fixed it on their end and told me things should be fine now and they were.
So call them, you cannot fix it without your hosting provider’s help.