Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php ^7.4 but your php version (8.1.2) does not satisfy that requirement. Problem 2 - Root composer.json requires elife/api-client dev-master -> satisfiable by elife/api-client[dev-master]. - elife/api-client dev-master requires php ^7.1 -> your php version (8.1.2) does not satisfy that requirement. Problem 3 - elife/api-problem is locked to version v1.1.0 and an update of this package was not requested. - elife/api-problem v1.1.0 requires php ^7.0 -> your php version (8.1.2) does not satisfy that requirement. Problem 4 - elife/api-validator is locked to version dev-master and an update of this package was not requested. - elife/api-validator dev-master requires php ^7.0 -> your php version (8.1.2) does not satisfy that requirement. Problem 5 - elife/bus-sdk is locked to version dev-master and an update of this package was not requested. - elife/bus-sdk dev-master requires php ^7.0 -> your php version (8.1.2) does not satisfy that requirement. Problem 6 - elife/content-negotiator is locked to version v1.0.1 and an update of this package was not requested. - elife/content-negotiator v1.0.1 requires php ^7.0 -> your php version (8.1.2) does not satisfy that requirement. Problem 7 - elife/ping is locked to version v1.0.0 and an update of this package was not requested. - elife/ping v1.0.0 requires php ^7.0 -> your php version (8.1.2) does not satisfy that requirement. Problem 8 - jms/serializer is locked to version 1.x-dev and an update of this package was not requested. - jms/serializer 1.x-dev requires php ^5.5|^7.0 -> your php version (8.1.2) does not satisfy that requirement. Problem 9 - symfony/console is locked to version v4.2.12 and an update of this package was not requested. - symfony/console v4.2.12 requires php ^7.1.3 -> your php version (8.1.2) does not satisfy that requirement. Problem 10 - symfony/psr-http-message-bridge is locked to version v1.2.0 and an update of this package was not requested. - symfony/psr-http-message-bridge v1.2.0 requires php ^7.1 -> your php version (8.1.2) does not satisfy that requirement. Problem 11 - phpunit/phpunit is locked to version 5.7.27 and an update of this package was not requested. - phpunit/phpunit 5.7.27 requires php ^5.6 || ^7.0 -> your php version (8.1.2) does not satisfy that requirement. Problem 12 - Root composer.json requires elife/api-sdk ^1.0@dev -> satisfiable by elife/api-sdk[1.0.x-dev (alias of dev-master)]. - elife/api-sdk dev-master requires php ^7.1 -> your php version (8.1.2) does not satisfy that requirement. - elife/api-sdk 1.0.x-dev is an alias of elife/api-sdk dev-master and thus requires it to be installed too. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.