YII2 When transferring from a local PC to a hosting, one model does not see the other. What could be the reasons?

Question

Yii

Good afternoon. I started to transfer a working project from a local machine to a hosting and problems appeared. The first and most important thing is that one model refers to another and does not see it.
Two models are in the same folder. Mistake:

Error
Class 'app\models\user' not found

Please tell me what could be causing this? If you need more information on an issue, please let me know.
Thanks in advance.

Answer 1

Do you have user , not User ? Register problem!
Change 'app\models\user'to'app\models\User'