Your requirements could not be resolved to an installable set of packages.
Problem 1
- Root composer.json requires drupal/element_class_formatter ^1.5 -> satisfiable by drupal/element_class_formatter[1.5.0, 1.x-dev].
- drupal/element_class_formatter[1.5.0, ..., 1.x-dev] require drupal/core ^8 || ^9 -> found drupal/core[8.0.0-beta6, ..., 8.9.x-dev, 9.0.0-alpha1, ..., 9.5.x-dev] but it conflicts with your root composer.json require (^10.1).
Problem 2
- Root composer.json requires drupal/hook_event_dispatcher ^3.3 -> satisfiable by drupal/hook_event_dispatcher[3.3.0, ..., 3.x-dev].
- drupal/hook_event_dispatcher[3.3.0, ..., 3.x-dev] require drupal/core ^9.3 -> found drupal/core[9.3.0-alpha1, ..., 9.5.x-dev] but it conflicts with your root composer.json require (^10.1).
Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.