Running into issues like
Attempt to create a field storage [...] with no type
when migrating from Drupal 6 or Drupal 7 to Drupal 8+?
Then you're propably missing a migration for a custom field type used in your project.
If it's your job to implement such a Field Type Migration, you're in the same situation in ran into.
So to save your time, here are the docs:
- https://www.drupal.org/docs/drupal-apis/migrate-api/migrate-field-plugi…
- https://www.drupal.org/docs/drupal-apis/migrate-api/writing-migrations-…
And this is a good example from the Drupal color_field module:
https://git.drupalcode.org/project/color_field/-/blob/3.0.x/src/Plugin/migrate/field/ColorField.php
Or a bit more complex one from geolocation:
https://git.drupalcode.org/project/geolocation/-/tree/8.x-3.x/src/Plugin/migrate
That should help you to get started :)
