I have been downloading extensions to check if i have any error with my code, but i cant find anything. All seens be right, but i dont know why my extension not add a new custom row in notification_types table. So the notifications not works cause of this. I uploaded my files here:
https://github.com/maelsanchez/GroupTWO
Hope any expert can help me with that, i try everything. Its weird because i tryed installing anothers extension with notifications and it works but i cant see any error in my code