Your lock file does not contain a compatible set of packages. Please run composer update.
Problem 1
- pelago/emogrifier is locked to version v7.0.0 and an update of this package was not requested.
- pelago/emogrifier v7.0.0 requires php ~7.3.0 || ~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 -> your php version (8.3.0) does not satisfy that requirement.
Problem 2
- bramley/phplist-plugin-common is locked to version dev-master and an update of this package was not requested.
- bramley/phplist-plugin-common dev-master requires pelago/emogrifier ~7.0 -> satisfiable by pelago/emogrifier[v7.0.0].
- pelago/emogrifier v7.0.0 requires php ~7.3.0 || ~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 -> your php version (8.3.0) does not satisfy that requirement.