If you include the log I might be able to tell why Easy Installer stopped or failed !
As you have TWRP successfully installed we can say Easy Installer has done the hardest part. You could now consider using the “expert” build instructions https://doc.e.foundation/devices/dreamlte/install (starting from the point where Recovery is already installed).
You also say that you cannot restart Easy Installer. Usually Easy Installer will run again without problems.
You have probably checked that you can switch manually with button presses to Download mode and Recovery mode. Please try this; start Easy Installer and connect the device Edit, and start Easy Installer, as you did the first time. Now switch modes to Download mode, Force stop, allow to reboot to Recovery mode. If necessary switch like this randomly and I expect Easy Installer to pick up at some point.