Install doesn't work with composer2

[joneppie]

With composer 2 you get the following error message:

Your lock file does not contain a compatible set of packages. Please run composer update.

  Problem 1
    - symfony/flex is locked to version v1.6.3 and an update of this package was not requested.
    - symfony/flex v1.6.3 requires composer-plugin-api ^1.0 -> found composer-plugin-api[2.1.0] but it does not match the constraint.