The virtual machine reinstallation request was denied

Hello.
Please check that the "Allow reinstall" option is enabled in your product settings.

The settings are enabled

I suspect that you might be experiencing issues with the unavailability of configuration options for your product. Please kindly review the instructions.

For the operating system:
https://doc.puq.info/books/proxmoxkvm-whmcs-module/page/configurable-option-operating-system-selection

For snapshots, backups, and IP configurations:
https://doc.puq.info/books/proxmoxkvm-whmcs-module/page/configurable-option-backupssnapshotscpuramipv4ipv6