can you help with these server errors

hello,
i've got these server errors and hope to solve em before to ruins the forum
post solution with number please

1 - server problem
Spoiler: 1

• XF\Db\InvalidQueryException: Error rendering widget: MySQL statement prepare error [1176]: Key 'last_post_date' doesn't exist in table 'xf_thread'
• src/XF/Db/AbstractStatement.php:230

SELECT xf_thread., xf_forum_Forum_1., xf_node_Node_2., xf_user_User_3....

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