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Call to a member function is_main_query() on a non-object

hi there, our test site uses your events pro and community events plugins. However when they are active they cause the fatal error you see ...

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查詢 「Is_main_query」的人也找了：

  1. is_main_query was called incorrectly
    2.
  2. pre_get_posts
    3.
  3. is_page
    4.
  4. query_posts
    5.
  5. pre_get_posts custom query
    6.
  6. is_post_type_archive
    7.
  7. query->set
    8.
  8. wp_query
    9.