Damage may be 0 or be displayed as miss due to various reasons such as enemy attributes, characteristics, etc.
Damage may also be 0 or be displayed as miss due to your own Accuracy, Attack, etc.
This is not an error, and the hotline does not provide any help with strategies for this.
Please further develop your character and equipment, and try out various parties.
We also recommend you to ask other users in our official community.