Multisite and Yoast sitemaps

I have two sites on the same server, both with Redis cache.

The first one is a simple WordPress install, the second one a multisite installation. I have Yoast SEO on both sites.

On the single site I can access the sitemaps without problem:

On the multisite one, it throws a 404 error:

I can acces the address it was supposed to be rewriting:
But if I click in one of the links it thows a 404 error.

I tried adding some rewrite rules to the user.conf file, but to no avail. The error log just shows not found.

Wonder if someone could point me to some direction to work it out?