Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpoffice/phpspreadsheet ^1.9 || ^2.0 || ^3.0 || ^4.0 || ^5.0 -> satisfiable by phpoffice/phpspreadsheet[1.30.0, 1.30.1, 1.30.2, 2.1.12, ..., 2.4.3, 3.10.0, 3.10.1, 3.10.2, 3.10.3, 5.0.0, ..., 5.4.0]. - phpoffice/phpspreadsheet 1.30.0 requires php ^7.4 || ^8.0 -> your php version (7.3.33) does not satisfy that requirement. - phpoffice/phpspreadsheet[1.30.1, ..., 1.30.2] require php >=7.4.0 <8.5.0 -> your php version (7.3.33) does not satisfy that requirement. - phpoffice/phpspreadsheet 2.1.12 requires php ^8.0 -> your php version (7.3.33) does not satisfy that requirement. - phpoffice/phpspreadsheet[2.1.13, ..., 2.1.14] require php >=8.0.0 <8.5.0 -> your php version (7.3.33) does not satisfy that requirement. - phpoffice/phpspreadsheet[2.4.2, ..., 2.4.3] require php >=8.1.0 <8.6.0 -> your php version (7.3.33) does not satisfy that requirement. - phpoffice/phpspreadsheet[2.4.0, ..., 2.4.1, 3.10.0, ..., 3.10.3, 5.0.0, ..., 5.4.0] require php ^8.1 -> your php version (7.3.33) does not satisfy that requirement.