Thanks for the info.
The Deprecated warning is basically just a heads-up that a function will be outdated in future PHP versions. By itself, it doesn’t cause an error.
It only shows up if Error Reporting is set to "Maximum" in your hosting or Joomla config. In a live environment, Error Reporting should ideally be set to "None".
The real issue can be the actual messages outputted, if they mess with the scanner’s output or processing. With Error Reporting off, the scan should work fine.
Still, it’s not ideal. I’ve already fixed the root cause — HTProtect 2.7.11 will be ready in about 5 minutes.
Please update to 2.7.11 when it’s out and let us know if the warnings disappear and the malware scan and core file check run smoothly again.