如何解决错误（使用一键导入WordPress导入数据时，内部服务器错误(500)（））

我正在从事WordPress主题开发, 一键演示导入时出现错误。我增加了最大执行时间, 但仍然收到此错误。它在介质中创建一个日志文件, 但没有错误。我的日志文件包含以下内容：

---Downloaded files--- The import files for: demotheme were successfully downloaded! Initial max execution time = 300 Files info: Site URL = http://demourl.com/live/demotheme Data file = /opt/lampp/htdocs/live/demotheme/wp-content/plugins/demo_plugin/inc/importer/demo-files/content.xml Widget file = /opt/lampp/htdocs/live/demotheme/wp-content/plugins/demo_plugin/inc/importer/demo-files/widgets.wie Customizer file = not defined! Redux files: options -> /opt/lampp/htdocs/live/demotheme/wp-content/plugins/demo_plugin/inc/importer/demo-files/options.json ------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!------ New AJAX call!---Importing widgets--- Primary : Search - No Title - Widget already exists Post List - No Title - Imported Recent Posts - No Title - Widget already exists Recent Comments - No Title - Widget already exists Archives - No Title - Widget already exists Categories - No Title - Widget already exists Meta - No Title - Widget already existsSecondary : Tag Cloud - No Title - ImportedFooter 1 : Text - About Us - ImportedFooter 2 : Navigation Menu - Useful Links - ImportedFooter 3 : Custom HTML - Working Hours - ImportedFooter 4 : Custom HTML - Newsletter - Imported---Importing Redux settings--- Redux settings import for: options finished successfully!

【如何解决错误（使用一键导入WordPress导入数据时，内部服务器错误(500)（））】以下是我的环境详细信息：