Plugin black list my sites till I contact support

I love the plugin but 2 out of 5 times I use it I have to contact my server support team to unblock my IP address. This is what they show the error as and are asking me what type of program I am using.

The IP address is blocked due to the following reason:

“ET WEB_SERVER Possible CVE-2014-6271 Attempt in HTTP Version Number”

More information about the CVE-2014-6271 is available below:

https://blogs.akamai.com/2014/09/environment-bashing.html

The firewall rule in questions looks for a string ‘ () {‘ sent from your IP to the web server).

Can you please provide us with more information what script or software you are using which is sending such strings to the web server so we can investigate this matter further?

Also the blockage will expire automatically within the next couple of minutes.

Any idea why it would be doing this?

https://wordpress.org/plugins/all-in-one-wp-migration/