I don't know if I'm knocking on the right door, but I really don't know what to do anymore...

My site is based on SP Page builder and I use Travelia as a template.

This may seem like a childishly simple problem, but I haven't been able to find the solution to my problem for several days. Before migrating my site from Joomla 3.10.11 to Joomla 4, I want to test the whole route locally, on MAMP 6. I backed up my site and uploaded it to MAMP. (Akeeba + kickstart) The administration part works without problem on the local host, but when I want to access the site itself, the URL address is that of my live site + the local address.

(https://www.travel-video.info/http://migration4host.local:8888/index.php).

After many tries, I deleted .htaccess (at least, I made it htaccess.txt), because there were a lot of redirects in this file. But that didn't change anything... Index.html links to the standard presentation page of the site, on the local server. On the other hand, index.php sends me back to the live site, + the address of the local site. I checked the DIR variable which gives me the right folder... and I checked configuration.php for the live_site value, which is empty. I can't see where the problem could come from. I disabled a few plugins, like for example sh404SEF, thinking it might cause redirects, but that didn't help either. Do you have a suggestion?