Hi giori
Thanks for your review, and welcome to the community.
Restoring the datasets is a quite complicated process for Cook.
Because it has been designed to retreive your datas even if you change the names of your tables or your fields.
If you rename a field, it restore it in the new field name.
If you delete a field, and recreate it with the same name, it will replace it.
In fact, you are true, I can see in my monitors that lot of users are dealing with such issue, even if it is not yet posted on Forum.
If the restoring process don't finish, you cannot even open the sandbox link.
Your component is installed, but not restored.
For the moment, we try to fix this, follow theses instructions :
Conserve the links of the sandboxes in your favorites, in order to be be able to enter.
You will see your component installed ... and empty.
Recreate one record (at least)
Regenerate your component, and it should pass.
Wy recreating one record ?
Because when Cook backup your component, if it is empty, it will not backup anything and will keep the last backup (For security reasons if an issue occurs between the backup and the restoring processes)
So...
You will unfortunatly lost your current datasets. This is the big deal until the bug fixed.
For the future, try to don't change the aliases of your tables and of your fields too much.
If you want to change an alias, do ONLY ONE modification at a time and always run in sandbox between two aliases modifications.
Hope you understand what I mean. I can precise better if you want.