Hi
Thanks for your message.
The request appears to have been erroneously hitting one of our mod_security firewall rules.
I have whitelisted the rule for you now, can you retest your side and let us know if this resolves the issue you are seeing. Please ensure you hard reset the page (Ctrl+F5) or try to load the site in a Private Window before retesting.
If not, there may be a chain of rules we need to disable one by one, and if this is the case full replication steps would be ideal (including a temporary login to the back end if necessary) so that we can whitelist all of the rules before getting back to you again.
We look forward to hearing from you.
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