setting a password on the XAMPP pages fails

[R.Gevred]

Hi all,

I have installed XAMPP version 7.1.1-0 on Linux Mint version 17.2 64-bit by running the two commands as referenced "How do I install XAMPP ?" on https://www.apachefriends.org/faq_linux.html page.

Then, I have run the command as referenced "How can I make my XAMPP installation more secure?" also on https://www.apachefriends.org/faq_linux.html.
It worked fine to protect MySql and FTP.
But setting a password on the XAMPP pages always fails with the following messages :

/opt/lampp/share/xampp/checkapache: ligne 41: /opt/lampp/htdocs/xampp/.htaccess: Aucun fichier ou dossier de ce type
cp: impossible d'évaluer «/opt/lampp/htdocs/xampp/.htaccess»: Aucun fichier ou dossier de ce type
cp: impossible d'évaluer «/opt/lampp/htdocs/xampp/.htaccess»: Aucun fichier ou dossier de ce type
chmod: impossible d'accéder à «/opt/lampp/htdocs/xampp/.htaccess»: Aucun fichier ou dossier de ce type
chmod: impossible d'accéder à «/opt/lampp/htdocs/webalizer/.htaccess»: Aucun fichier ou dossier de ce type
chmod: impossible d'accéder à «/opt/lampp/phpmyadmin/.htaccess»: Aucun fichier ou dossier de ce type

Sorry, those warnings are issued in french ; however, it is understandable that none of the requested *.htaccess files have been created upon installation.
Can you help me fixing this issue ?