One of the most important steps in the installation process is installing the required plugins. Immediately after activating the theme, you will be able to automatically install all required plugins.
If you skip the theme activation step, you will not be able to install the Maniel Core plugin.
You can disable the installation of some plugins (just click on the checkbox next to the plugin name). But it is not recommended to disable plugins marked REQ, because of this, there may be problems with the theme.