Forcing www. in htaccess on a multi-language site not working

I’m using this code to force www. in htaccess:

RewriteCond %{HTTP_HOST} !^www\..+$ [NC]
RewriteCond %{HTTP_HOST} (.+)$ [NC]
RewriteRule ^(.*)$ https://www.%1/$1 [R=301,L]

It doesn’t seem to be working if I include the language such as Home - TSPA, or any subpage for that matter (About - TSPA), it’s redirecting to https://www.tspa.eu/index.php and showing ’ Not Found. The requested URL was not found on this server.'.

It works fine for the main domain https://tspa.eu

Any ideas?

Could you post the complete .htaccess, please?

# Kirby .htaccess
# revision 2020-06-15

# rewrite rules
<IfModule mod_rewrite.c>

# enable awesome urls. i.e.:
# http://yourdomain.com/about-us/team
RewriteEngine on

# make sure to set the RewriteBase correctly
# if you are running the site in a subfolder;
# otherwise links or the entire site will break.
#
# If your homepage is http://yourdomain.com/mysite,
# set the RewriteBase to:
#
# RewriteBase /mysite

# In some environments it's necessary to
# set the RewriteBase to:
#
# RewriteBase /

# block files and folders beginning with a dot, such as .git
# except for the .well-known folder, which is used for Let's Encrypt and security.txt
RewriteRule (^|/)\.(?!well-known\/) index.php [L]

# block all files in the content folder from being accessed directly
RewriteRule ^content/(.*) index.php [L]

# block all files in the site folder from being accessed directly
RewriteRule ^site/(.*) index.php [L]

# block direct access to Kirby and the Panel sources
RewriteRule ^kirby/(.*) index.php [L]

# make site links work
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*) index.php [L]

</IfModule>

# pass the Authorization header to PHP
SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=$1

# compress text file responses
<IfModule mod_deflate.c>
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/javascript
AddOutputFilterByType DEFLATE application/json
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
</IfModule>

RewriteCond %{HTTP_HOST} !^www\..+$ [NC]
RewriteCond %{HTTP_HOST} (.+)$ [NC]
RewriteRule ^(.*)$ https://www.%1/$1 [R=301,L]

Made me realise I haven’t actually updated this for a while, maybe that’s the issue

The problem is that you put it at the end of the file, while it should go before RewriteRule (^|/)\.(?!well-known\/) index.php [L]

Ah I see, thanks!