To move my sites, I create quickstart packages from scratch.
The problem I've had with Joomla 5.4.0 (and possibly Joomla 6) is that when installing Joomla with SP Page Builder, I get the following error message: "The install adapter does not exist." and the installation stops.
After investigating, I found that the problem is an extension record with no name and no type in the #__extensions table. This record is created when SP Page Builder is installed, and the only field with a value is PARAMS, which has the value: {"sppb_color_variables":[]}
The Joomla 5.4.0 installer uses refreshManifestCache(), and when it encounters an extension with no name or type, it doesn't know which manifest to refresh and stops.
I think this needs to be fixed. If it's a bug in the SP Page Builder installer, it should be removed, or if this is necessary for sppb_color_variables, they should improve it because an extension without a name or type isn't possible.
Regards