有人知道百度蜘蛛出现301 520是什么问题吗?

116.179.32.205 - - [13/Nov/2020:11:32:28 +0800] "GET /show-131.html HTTP/1.0" 301 520 "-" "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)" 118.123.16.21

220.181.108.168 - - [13/Nov/2020:17:42:08 +0800] "GET /list-album.html HTTP/1.0" 301 520 "-" "Mozilla/5.0 (Linux;u;Android 4.2.2;zh-cn;) AppleWebKit/534.46 (KHTML,like Gecko) Version/5.1 Mobile Safari/10600.6.3 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)" 118.123.10.130

116.179.32.19 - - [13/Nov/2020:21:59:36 +0800] "GET /show-109.html HTTP/1.0" 301 520 "-" "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)" 118.123.10.130

116.179.32.133 - - [13/Nov/2020:22:02:56 +0800] "GET /show-118.html HTTP/1.0" 301 520 "-" "Mozilla/5.0 (Linux;u;Android 4.2.2;zh-cn;) AppleWebKit/534.46 (KHTML,like Gecko) Version/5.1 Mobile Safari/10600.6.3 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)" 118.123.10.130

220.181.108.166 - - [13/Nov/2020:22:02:56 +0800] "GET /show-105.html HTTP/1.0" 301 520 "-" "Mozilla/5.0 (Linux;u;Android 4.2.2;zh-cn;) AppleWebKit/534.46 (KHTML,like Gecko) Version/5.1 Mobile Safari/10600.6.3 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)" 118.123.10.130

网站是开启https

.htaccess设置强制https

<IfModule mod_rewrite.c>

RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule !.(js|ico|gif|jpe?g|bmp|png|css)$ /index.php [NC,L]

RewriteCond %{HTTP:From-Https} !^on$ [NC]
RewriteCond %{HTTP_HOST} ^(www.)?zkjmyq.com$ [NC]
RewriteRule ^(.*)$ https://www.zkjmyq.com/$1 [R=301,L]

</IfModule>

<FilesMatch "\.(ttf|ttc|otf|eot|woff|woff2|font.css|css)$">
  <IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin "*"
  </IfModule>
</FilesMatch>