Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires dotkernel/dot-controller ^3.4.3 -> satisfiable by dotkernel/dot-controller[3.4.3, 3.5.0, 3.5.1]. - dotkernel/dot-controller[3.4.3, ..., 3.5.1] require php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 2 - Root composer.json requires dotkernel/dot-errorhandler ^4.0.0 -> satisfiable by dotkernel/dot-errorhandler[4.0.0]. - dotkernel/dot-errorhandler 4.0.0 requires php ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 3 - Root composer.json requires dotkernel/dot-twigrenderer ^3.4.3 -> satisfiable by dotkernel/dot-twigrenderer[3.4.3, 3.5.0, 3.5.1]. - dotkernel/dot-twigrenderer[3.4.3, ..., 3.5.1] require php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 4 - Root composer.json requires laminas/laminas-component-installer ^3.4.0 -> satisfiable by laminas/laminas-component-installer[3.4.0]. - laminas/laminas-component-installer 3.4.0 requires php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 5 - Root composer.json requires mezzio/mezzio ^3.18.0 -> satisfiable by mezzio/mezzio[3.18.0, 3.19.0, 3.19.1]. - mezzio/mezzio[3.19.0, ..., 3.19.1] require php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 6 - Root composer.json requires mezzio/mezzio-fastroute ^3.11.0 -> satisfiable by mezzio/mezzio-fastroute[3.11.0]. - mezzio/mezzio-fastroute 3.11.0 requires php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 7 - Root composer.json requires laminas/laminas-development-mode ^3.12.0 -> satisfiable by laminas/laminas-development-mode[3.12.0]. - laminas/laminas-development-mode 3.12.0 requires php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 8 - laminas/laminas-code 3.4.1 requires php ^7.1 -> your php version (8.4.0RC1) does not satisfy that requirement. - laminas/laminas-code[4.0.0, ..., 4.4.3] require php ^7.4 || ~8.0.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - laminas/laminas-code[4.5.0, ..., 4.7.1] require php >=7.4, <8.2 -> your php version (8.4.0RC1) does not satisfy that requirement. - laminas/laminas-code[4.8.0, ..., 4.12.0] require php ~8.1.0 || ~8.2.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - laminas/laminas-code[4.13.0, ..., 4.14.0] require php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - friendsofphp/proxy-manager-lts[v1.0.16, ..., v1.0.18] require laminas/laminas-code ~3.4.1|^4.0 -> satisfiable by laminas/laminas-code[3.4.1, 4.0.0, ..., 4.14.0]. - Root composer.json requires friendsofphp/proxy-manager-lts ^1.0.16 -> satisfiable by friendsofphp/proxy-manager-lts[v1.0.16, v1.0.17, v1.0.18].