I activated the option "Minify HTML Advanced" in my template, to delete HTML comments.
But that deletes images from the page.
Looking closer, I noticed that this option deletes the first slash in the img tag

img src = "/images/folder/myimage.jpg"

BECOMES:
img src = "images/folder/myimage.jpg"

That changes the relative URL, and the images disappear. (Idem on Windows and Linux server)

I found the code of this this option in the following file "libraries\astroid\framework\library\astroid\Document.php"
I noticed that this problem was caused by the $ns1 variable at line 432. It is a too complex regex for me.

While waiting for a solution to be found, I solved my problem in an incorrect, but radical way.
I simply canceled the variable like this> $ns1 = '';

Now the minification may not be complete, but I have no more comments or excess spaces.
And the paths of my images are not destroyed.

I thought it could also come from the SEF of Joomla 4, but I found nothing on this subject.
If this is not the case, I think you will find a more elegant solution than mine to modify this regex.
Thanks.