We've developed a single page web app. Users, who have Sophos Anti-Virus for Mac installed, get "501 - Not implemented" error from our webserver.
With Sophos installed this error is thrown in approximately every once in every seven XMLHttpRequests using the 'POST'-method. Without Sophos this never happens.
We are currently advising users to uninstall Sophos, do you have an alternative solution? What happens to these POSTs?
We're using 4D webserver 13.5 build 178495. Our users report this problem on various browsers on Mac.
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