Error 501 when saving an email customisation

-- HikaShop version -- : 3.0.1
-- Joomla version -- : 3.4.3
-- PHP version -- : 5.6.30
-- Browser(s) name and version -- : Chrome and Firefox
-- Error-message(debug-mod must be tuned on) -- : Error 501

Hello,

I want to add some information to the Order Creation Notification and Order Status Notification emails. The information is static (bank account details text) and it is the same for both emails.

I changed the html in the Order Status email and saved - this worked fine. I then added the same information to the Order Creation email and when I saved I got Error 501 from the server. I tried both Save, Save and Close, and Cancel. All the same, error 501. The only way out was to close the tab.

I then tried the same on Firefox with the same result. Error 501 saving or cancelling the Order Creation email.

I then tried editing two other emails and they both worked OK on both browsers. So the problem is in the Order Creation email and not in the others.

Has anyone found this and is there a fix for it?

Cheers

Tim

Many thanks Nicolas,

I initially thought that this was a server security matter, however I was unsure because the error only came up in one of the emails, not in all of them.

I have how edited the email and created the 'modified' version through FTP and the problem is resolved.

Cheers

Tim