Hi I just updated to 4.19.2 and when I tried to put my project in the only things that showed up in the editor were the engines starter content I have tried putting my assets in via file explorer and import none of these seem to work i have replicated this on three separate projects 2 from 19.2 and one from 18.3 as these were what it aloud me to do my project was previously on 19.1 in which I made the assets on.
Try using the migration tool/option. Right click on your root folder/s, - > Migrate… → Select content folder of the target project.
If the tool shows an error while migrating. try to migrate individual folders, then individual assets to zero in on the asset that is failing to migrate.