Synology-Docker Callibre-web meet errors when converting ebooks

Hello, I love your images, but I have trouble converting ebooks.

Configure environment variables as follows:

{
   "cap_add" : null,
   "cap_drop" : null,
   "cmd" : "",
   "cpu_priority" : 50,
   "devices" : null,
   "enable_publish_all_ports" : false,
   "enable_restart_policy" : false,
   "enabled" : true,
   "entrypoint_default" : "/init",
   "env_variables" : [
      {
         "key" : "DOCKER_MODS",
         "value" : "linuxserver/calibre-web:calibre"
      },
      {
         "key" : "PGID",
         "value" : "$(id -g)"
      },
      {
         "key" : "GUID",
         "value" : "$(id -u)"
      },
      {
         "key" : "PATH",
         "value" : "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
      },
      {
         "key" : "HOME",
         "value" : "/root"
      },
      {
         "key" : "LANGUAGE",
         "value" : "zh_CN.UTF-8"
      },
      {
         "key" : "LANG",
         "value" : "zh_CN.UTF-8"
      },
      {
         "key" : "TERM",
         "value" : "xterm"
      }
   ],
   "exporting" : false,
   "id" : "ed93a3405873bf2236e0962a81ddd54d85b542c40bd101a3208211068ca82993",
   "image" : "linuxserver/calibre-web:latest",
   "is_ddsm" : false,
   "is_package" : false,
   "links" : [],
   "memory_limit" : 0,
   "name" : "linuxserver-calibre-web1",
   "network" : [
      {
         "driver" : "bridge",
         "name" : "bridge"
      }
   ],
   "network_mode" : "bridge",
   "port_bindings" : [
      {
         "container_port" : 8083,
         "host_port" : 8083,
         "type" : "tcp"
      }
   ],
   "privileged" : true,
   "shortcut" : {
      "enable_shortcut" : false
   },
   "use_host_network" : false,
   "volume_bindings" : [
      {
         "host_volume_file" : "/work/calibre/scr",
         "mount_point" : "/app/calibre-web/cps/metadata_provider",
         "type" : "rw"
      },
      {
         "host_volume_file" : "/work/calibre/library",
         "mount_point" : "/books",
         "type" : "rw"
      },
      {
         "host_volume_file" : "/work/calibre/config",
         "mount_point" : "/config",
         "type" : "rw"
      }
   ]
}

It is worth emphasizing that I have added environment variables that support e-book conversion:
DOCKER_MODS=linuxserver/calibre-web:calibre

Then, modify the following configuration in the setting interface of calibre-web:

Finally, I try to convert mobi books to pdf or epub books and I get an error:

user task status progress run time start time
wotemerile Convert: MOBI → PDF: 伊藤潤二恐怖漫畫精選【5】:雙一的快樂 Failed 100 % 11s 7/18/22,8:03am
wotemerile Convert: MOBI → EPUB: 伊藤潤二恐怖漫畫精選【1】:富江 Failed 100% 3s 7/18/22,8:27am

The log is as follows:
[2022-07-18 08:03:29,837] INFO {cps.editbooks:1146} converting: book id: 18 from: MOBI to: PDF
[2022-07-18 08:03:30,577] INFO {cps.tasks.convert:142} Book id 18 - target format of .pdf does not exist. Moving forward with convert.
[2022-07-18 08:03:42,454] INFO {cps.tasks.convert:189} ebook converter failed with error while converting book
[2022-07-18 08:08:03,877] INFO {cps.admin:1746} Update status requested
[2022-07-18 08:27:53,869] INFO {cps.editbooks:1146} converting: book id: 14 from: MOBI to: EPUB
[2022-07-18 08:27:53,881] INFO {cps.tasks.convert:142} Book id 14 - target format of .epub does not exist. Moving forward with convert.
[2022-07-18 08:27:57,614] INFO {cps.tasks.convert:189} ebook converter failed with error while converting book

the convert functionality is showing in the readme as x86_64 only. Is your synology x86_64 or some arm variant?

My synology’s CUP is J1900, which is X86_64