You will have to reach out to the plugin developers and ask them to namespace their dependencies. You can add a link to Compatibility | Acorn Docs | Roots “Plugin developers need to wrap their dependencies with their own namespace…”
In the meantime you might get away with commenting out a reference to psr/log. This is the temporary solution for WPML, you can adjust it to your needs: https://discourse.roots.io/t/solved-acorn-v3-v4-upgrade-psr-logger-issue-bedrock-wpml-fatal-error-declaration-of-monolog-logger-emergency/26987/7?u=tombro
I can see they also require psr/container and some symfony requirements which might also be incompatible.