The very early “screens” of Easy Installer deal with setting up the phone ready for install of /e/OS.
These screens may deal with unfamiliar subjects. I would suggest at the next run you allow time to run the first few screens slowly.
As you come to unfamiliar items perhaps compare with what is written in the early sections of the Command line install page https://doc.e.foundation/devices/herolte/install. This way you can reassure yourself that you are on the right path.
So one would need sight of those error messages to know if it was related to MTP or, more likely, something different.
The download is not expected to start until Easy Installer has made contact with the device and identified it as supported.