FiveM gcphone does not appear on the display

[Mr-Rene]

Hello, I added gcphone to my server from this site https://github.com/N3MTV/gcphone and copied two files gcphone and gcphone-master and put them in [esx_addons] folder and in server.cfg file I wrote start esx_gcphone-master a
start gcphone, I restarted the server and connected to the server, opened the phone, but my character only makes an animation that opens the phone, but the phone display does not appear on the screen. I also looked at the forums but it didn't solve my problem, I will be grateful if someone can help me.

Thank you in advance.