3. Conflict with Other Plugins

  • There might be a conflict with another plugin.
  • Temporarily deactivate other plugins to check if the issue persists.
  • If it works after deactivating other plugins, re-enable them one by one to identify the conflicting plugin.

4. Theme-Specific Issues

  • Some themes might not fully support the functionality provided by the “Multiple Themes” plugin.
  • Ensure the secondary theme is compatible with the plugin and works independently when set as the main theme.

5. Caching Issues

  • Caching plugins or browser cache might be causing the issue.
  • Clear your WordPress site cache (if you have a caching plugin) and browser cache.
  • If you’re using a server-side cache (e.g., Cloudflare or hosting provider cache), clear that as well.

6. Incorrect Page URL

  • Verify that the URL you’re trying to target in the “Multiple Themes” plugin settings matches the new page’s actual URL.
  • Ensure the full URL structure (with or without /) matches.