问致命错误:未定义错误:调用未定义函数wpcf7

EN

我需要帮助如何修复致命错误。当我下载联系人表格7插件时，当我点击激活按钮时，下面的消息就会弹出。这条信息阻止我访问我网站的后端。

拜托我真的需要帮助。

致命错误:未定义错误:调用/home3/africsis/public_html/bethelbright/wp-content/plugins/contact-form-7-simple-hidden-field/cf7-simple-hidden-field.php:30堆栈跟踪中的未定义函数wpcf7_add_shortcode()：#0 /home3/africsis/public_html/bethelbright/wp-includes/class-wp-hook.php(298)：wpcf7 7_simple_ /home3/africsis/public_html/bethelbright/wp-includes ->init(‘’) #1 /home3/africsis/public_html/bethelbright/wp-includes/class-wp-hook.php(323)：WP_Hook->apply_filters(NULL，数组) #2 /home3/africsis/public_html/bethelbright/wp-includes/plugin.php(453)：WP_Hook->do_action(Array) #3 /home3/africsis/public_html/bethelbright/wp-settings.php(325)：do_action('plugins_loaded') #4 /home3/africsis/public_html/bethelbright/wp-config.php(93)：require_once(‘/home3 3/africsis.’) #5 /home3 3/africsis/public_html/bethelbright/wp-load.php(37)：require_once(‘/home3 3/africsis.’) #6 /home3/africsis/public_html/bethelbright/wp-admin/index.php(10)：require_once(‘/home3 3/africsis.’) #7 /home3/africsis/public_html/bethelbright/wp-admin/index.php(10)：require_once(‘/home3 3/africsis in /home3/africsis/public_html/bethelbright/wp-content/plugins/contact-form-7 )-simple-hidden-field/cf7-simple-hidden-field.php在第30行