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www.xum.irWhich is the site url?
this only happen on some files ( mostly on big files > 2 mb files ) + files removed after 4-5 try and in this case file removed after 17 retrySeems to be related with the admin account, I can't test it. Try to do a clean install in another subdomain and folder and see if it happens, most likley you edited something and you wreak the system.