Your requirements could not be resolved to an installable set of packages. Problem 1 - escolalms/payments 0.x-dev is an alias of escolalms/payments dev-main and thus requires it to be installed too. - escolalms/payments[dev-main, 0.2.15, ..., 0.x-dev] require mnastalski/przelewy24-php dev-fix/18-transaction-refund -> satisfiable by mnastalski/przelewy24-php[dev-fix/18-transaction-refund]. - mnastalski/przelewy24-php dev-fix/18-transaction-refund requires php ^8.1 -> your php version (8.0.20) does not satisfy that requirement. - escolalms/payments[0.2.0, ..., 0.2.14] require mnastalski/przelewy24-php ^0.0.4 -> satisfiable by mnastalski/przelewy24-php[v0.0.4] from composer repo (https://repo.packagist.org) but mnastalski/przelewy24-php[dev-master, dev-fix/12-urlCardPaymentNotification-support, dev-fix/14-card-payments, dev-fix/18-transaction-refund] from vcs repo (github https://github.com/dbojdo/przelewy24-php) has higher repository priority. The packages from the higher priority repository do not match your constraint and are therefore not installable. That repository is canonical so the lower priority repo's packages are not installable. See https://getcomposer.org/repoprio for details and assistance. - Root composer.json requires escolalms/payments ^0 >=0.2.0 -> satisfiable by escolalms/payments[0.2.0, ..., 0.x-dev (alias of dev-main)].

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Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v2. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.