Question about cyberpanel.swap

Upon installation, a swap file is created called /cyberpanel.swap
It is also added to /etc/fstab:
/cyberpanel.swap swap swap sw 0 0

However, Centos does not detect this as a swap file.
Is this intended, or something wrong here?

Example:

‘free -m’

          total        used        free      shared  buff/cache   available

Mem: 3789 564 158 67 3066 2874
Swap: 0 0 0

‘swapon -s’

no results

Additional info:

[root@one /]# swapon cyberpanel.swap
swapon: cyberpanel.swap: swapon failed: Invalid argument

This is on a default Centos 7 VPS from Upcloud.