I am getting these errors:

Composer autoloader not found. please run "composer install"

bash-4.2$ php -d disable_functions=none ../composer.phar install --ignore-platform-req=ext-imap
Installing dependencies from lock file (including require-dev)
Verifying lock file contents can be installed on current platform.
Your lock file does not contain a compatible set of packages. Please run composer update.

Problem 1
- wikimedia/composer-merge-plugin is locked to version v1.4.1 and an update of this package was not requested.
- wikimedia/composer-merge-plugin v1.4.1 requires composer-plugin-api ^1.0 -> found composer-plugin-api[2.3.0] but it does not match the constraint.

bash-4.2$ php -d disable_functions=none ../composer.phar update --ignore-platform-req=ext-imap
Loading composer repositories with package information
Info from https://repo.packagist.org: #StandWithUkraine
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Root composer.json requires wikimedia/composer-merge-plugin ^1.4 -> satisfiable by wikimedia/composer-merge-plugin[v1.4.0, v1.4.1].
- wikimedia/composer-merge-plugin[v1.4.0, ..., v1.4.1] require composer-plugin-api ^1.0 -> found composer-plugin-api[2.3.0] but it does not match the constraint.

bash-4.2$ php -d disable_functions=none ../composer.phar install --ignore-platform-req=ext-imap
Installing dependencies from lock file (including require-dev)
Verifying lock file contents can be installed on current platform.
Your lock file does not contain a compatible set of packages. Please run composer update.

Problem 1
- wikimedia/composer-merge-plugin is locked to version v1.4.1 and an update of this package was not requested.
- wikimedia/composer-merge-plugin v1.4.1 requires composer-plugin-api ^1.0 -> found composer-plugin-api[2.3.0] but it does not match the constraint.

branch 7.11.x