The file is with the dot at the front and the txt extremely removed! I have tired a few codes I find online but nothing works for me 
My hosting is 1and1.fr
I see you are using Cloudflare for SSL. I seemed to remember some issues with Htaccess that just require some additional steps or can be bypassed all together in favor of “page rules” as Cloudflare calls it.
EDIT: did a quick search and came up with this.