Support » Fixing WordPress » [Plugin: WP-dTree] WordPress database error: [Unknown column 'hash' in 'where clause&

  • I get these messages when I activated the widget in the sidebar. Any ideas? This happened after upgrading to 4.0.

    WordPress database error: [Unknown column ‘hash’ in ‘where clause’]
    SELECT content FROM wp_dtree_cache WHERE hash = UNHEX(MD5(‘a:32:{s:5:\”title\”;s:6:\”Strane\”;s:5:\”cache\”;i:1;s:6:\”opento\”;s:0:\”\”;s:7:\”oclinks\”;i:1;s:8:\”uselines\”;i:1;s:8:\”useicons\”;i:0;s:7:\”exclude\”;s:0:\”\”;s:11:\”closelevels\”;i:1;s:11:\”folderlinks\”;i:1;s:13:\”showselection\”;i:1;s:7:\”include\”;s:0:\”\”;s:15:\”opentoselection\”;i:1;s:8:\”truncate\”;i:23;s:10:\”sort_order\”;s:3:\”ASC\”;s:6:\”sortby\”;s:4:\”name\”;s:8:\”treetype\”;s:3:\”cat\”;s:8:\”cpsortby\”;s:9:\”post_date\”;s:11:\”cpsortorder\”;s:4:\”DESC\”;s:10:\”hide_empty\”;i:1;s:8:\”child_of\”;i:0;s:6:\”parent\”;s:4:\”none\”;s:10:\”allowdupes\”;i:1;s:11:\”postexclude\”;s:0:\”\”;s:9:\”listposts\”;i:1;s:7:\”showrss\”;i:0;s:9:\”showcount\”;i:0;s:8:\”taxonomy\”;s:8:\”category\”;s:10:\”pad_counts\”;i:1;s:12:\”hierarchical\”;i:0;s:6:\”number\”;i:0;s:24:\”include_last_update_time\”;i:0;s:8:\”title_li\”;s:0:\”\”;}’)) LIMIT 1

    WordPress database error: [Unknown column ‘hash’ in ‘field list’] etc…….

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