Unable to decode output into JSON: Syntax error

My sites are having the same issue. PHP 8.1 here and it completely takes out the environment.

Carlos Romero → made their first commit to this issue’s fork.

Hello,

the problem is the encode and supportsEncoding functions, has parameters for dynamic functions, in the latest version of symfony/serializer it is like this but the composer requirements in drupal 9 only reach version ^4.4 of symfony/serializer:

I have made a mr and I leave a .patch here for whoever needs it.

https://www.drupal.org/files/issues/2023-09-16/3387514.patch →

All the best.