[SOLVED][Drupal Errors] "Method POST is not allowed for the URL /index.htm" error (Error 405) Drupal Technical | 1 min read Many Drupal users have encountered the following error in their Drupal sites. "Method POST is not allowed for the URL /index.htm" error (Error 405). If you are encountering the same error in your Drupal site then read on to find out more.