Environment

• WordPress: 6.6-beta2
• PHP: 8.3.7
• Server: LiteSpeed
• Database: mysqli (Server: 10.6.18-MariaDB / Client: mysqlnd 8.3.7)
• Browser: Edge 125.0.0.0 (Windows 10/11)
• Theme: Twenty Twenty-Four 1.1
• MU-Plugins:
  • block-automation-by-installatron.php
  • Health Check Troubleshooting Mode 1.9.0
• Plugins:
  • Core Rollback 1.3.5
  • Enable jQuery Migrate Helper 1.4.0
  • Health Check & Troubleshooting 1.7.0
  • Limit Login Attempts Reloaded 2.26.9
  • Plugin Check (PCP) 1.0.1
  • Plugin Compatibility Checker 3.0.1
  • Query Monitor 3.16.3
  • Stop User Enumeration 1.6
  • WordPress Beta Tester 3.5.5
  • WPVulnerability 3.2.0

Steps to Reproduce

1. Enable Debug logging
2. Install and activate the plugin Health Check & Troubleshooting
3. Navigate to Tools - Site Health - Tools
4. 🐞 Bug occurs. Following shows in the log files:
   PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in xx/public_html/blog/wp-includes/formatting.php on line 4720