Just tryed to Install several (older) Themes from your download page.
Most of them result in one or more errors .
Many Quickstart Packages have old version of Joomla 4 and old versions of Page Builder Pro inside. That would result in Fail install or/and php errors.
Could you pleas update your Quickstart Theme Packages that they fullfill Joomla 4.4 with lates SP Page Builder Version and related updeted extensions ?
It dont make any sense if a so called Quickinstall result in a huge debugging Opera .
Some themes even dont work under recomended php 8.1
Themes Affekted : Yoga / YAMAS
Theme Worked out of the box : KREATIVA
System : OSX , MAMP 6, php8.08 + Php8.125 | MYSQL 8.1