Could you update your plugins for install it with sylius 1.12
Problem 1
- odiseoteam/blog-bundle[v1.2.0, ..., 1.2.x-dev] require symfony/framework-bundle ^4.4 || ^5.2 -> found symfony/framework-bundle[v4.4.0-BETA1, ..., 4.4.x-dev, v5.2.0-BETA1, ..., 5.4.x-dev] but these were not loaded, likely because it conflicts with another require.
- odiseoteam/sylius-blog-plugin[v1.3.0, ..., v1.3.3] require sylius/sylius ~1.9.0 || ~1.10.0 -> found sylius/sylius[v1.9.0-ALPHA.1, ..., 1.10.x-dev] but it conflicts with your root composer.json require (^1.12).
- odiseoteam/sylius-blog-plugin[v1.3.4, ..., 1.3.x-dev] require odiseoteam/blog-bundle ^1.2 -> satisfiable by odiseoteam/blog-bundle[v1.2.0, 1.2.x-dev].
Could you update your plugins for install it with sylius 1.12