I have applied a patch from
#10
📌
Automated Drupal 10 compatibility fixes
Fixed
Still produces the errors
PHP Fatal error: Declaration of Drupal\jsonapi_schema\Normalizer\DataDefinitionNormalizer::supportsNormalization($data, ?string $format = null, array $context = []): bool must be compatible with Drupal\serialization\Normalizer\NormalizerBase::supportsNormalization($data, $format = null) in /app/docroot/modules/contrib/jsonapi_schema/src/Normalizer/DataDefinitionNormalizer.php on line 180
Fatal error: Declaration of Drupal\jsonapi_schema\Normalizer\DataDefinitionNormalizer::supportsNormalization($data, ?string $format = null, array $context = []): bool must be compatible with Drupal\serialization\Normalizer\NormalizerBase::supportsNormalization($data, $format = null) in /app/docroot/modules/contrib/jsonapi_schema/src/Normalizer/DataDefinitionNormalizer.php on line 180