Composer Client und Contao 3.5

[sebmeg3]

Hallo,

ich habe gerade den großen Spaß in einer Contao 3.5er Version eine Erweiterung installieren zu müssen. Ich hab dazu den Composer Client installiert allerdings erhalte ich beim ausführen nur folgende Fehlermeldung. Die composer.json ist komplett leer (außer der Zeile mit dem Composer Client). Hat jemand hier zufällig eine Idee woran es hier hängt? Danke.

$ /opt/plesk/php/7.3/bin/php -d memory_limit=6G -d max_execution_time=900 composer.phar update --no-ansi --no-interaction --dry-run --prefer-dist
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

Problem 1
- contao-community-alliance/composer-client 0.17.x-dev is an alias of contao-community-alliance/composer-client dev-master and thus requires it to be installed too.
- contao-community-alliance/composer-client 0.17.x-dev is an alias of contao-community-alliance/composer-client dev-develop and thus requires it to be installed too.
- contao-community-alliance/composer-client[dev-master, dev-develop, 0.16.0-beta1, ..., 0.17.0] require contao-community-alliance/composer-plugin ^2.3.8 -> satisfiable by contao-community-alliance/composer-plugin[2.3.8, ..., 2.4.x-dev].
- contao-community-alliance/composer-client[0.14, ..., 0.15.4] require contao-community-alliance/composer-plugin ~2.2 -> satisfiable by contao-community-alliance/composer-plugin[2.2, ..., 2.4.x-dev].
- contao-community-alliance/composer-plugin[2.2, ..., 2.3.3] require composer-plugin-api 1.0.0 -> found composer-plugin-api[2.0.0] but it does not match the constraint.
- contao-community-alliance/composer-plugin[2.3.4, ..., 2.4.x-dev] require composer-plugin-api ^1.0 -> found composer-plugin-api[2.0.0] but it does not match the constraint.
- Root composer.json requires contao-community-alliance/composer-client ~0.14 -> satisfiable by contao-community-alliance/composer-client[0.14, ..., 0.17.x-dev (alias of dev-develop)].

You are using Composer 2, which some of your plugins seem to be incompatible with. Make sure you update your plugins or report a plugin-issue to ask them to support Composer 2.

[Spooky]

Stelle in den Einstellungen ein, dass Composer nicht automatisch aktualisiert wird und ersetze danach die composer/composer.phar mit dieser Version.