I can't run v2ray in qv2ray

In qv2ray when I set the core path in the settings and click on Check v2ray core settings, I get this message:

Core control file is lacking executable permission for the current user.Qv2ray tried to set, but failed because permission denied.

I have installed qv2ray from flatpak. The permissions of the core file is:

-rwxrwxrwx

What is the problem?