You should have followed the steps in this post, which included installing the version 3.0.5 before upgrading to the latest version. The version 3.0.5 renames the traditional modules, so it doesn't cause a conflict when upgrading to the reactive version.
If your factory is small enough, you can simply uninstall Ultimate PDF and install the latest version.
Otherwise, I would recommend installing the version 3.0.5 again, and follow at least the first 5 steps in this post.