Error installation

[Ben13009]

Bonjour,

je rencontre un probleme lors de l'installation:
Problem 1
- Root composer.json requires roave/better-reflection 3.4.0 -> satisfiable by roave/better-reflection[3.4.0].
- roave/better-reflection 3.4.0 requires php >=7.2.0,<7.4.0 -> your php version (7.4.25) does not satisfy that requirement.

Avez vous une idée?
Merci d'avance pour votre aide.

[Ben13009]

Voila le meassge complet que j'ai. Je suis sur un raspberry:

pi:~/Viessmann-Api $ curl -sS https://getcomposer.org/installer | php composer.phar install

No composer.lock file present. Updating dependencies to latest instead of installing from lock file. See https://getcomposer.org/install for more information.
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Root composer.json requires roave/better-reflection 3.4.* -> satisfiable by roave/better-reflection[3.4.0].
- roave/better-reflection 3.4.0 requires php >=7.2.0,<7.4.0 -> your php version (7.4.25) does not satisfy that requirement.

[Ben13009]

J'ai tape la commade : composer require-dev roave/better-reflection

mais maintenant j'ai une autre erreur:
curl: (35) OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to getcomposer.org:443