Nextcloud: sharecmd stops upload at 1024KB and produces 0 byte files

[moba]

sharecmd looks like a great tool, thank you for it! unfortunately, i can't get it to work with nextcloud. it shows the correct size on the command line, but seems to stop at 1024KB and the resulting shared file on the server side is 0 bytes, no matter what i do.

ShareCmd Version: 0.0.106
tmp ❯ cat ~/.config/sharecmd/config.json | json_pp                                                                                         ⏎
{
   "Path" : "/sharecmd",
   "URLShortenerProvider" : "",
   "URLShortenerSettings" : {},
   "provider" : "nextcloud",
   "providersettings" : {
      "password" : "XXX",
      "url" : "https://subdomain.example.com/",
      "username" : "YYY"
   }
}
tmp ❯ share FILE
Uploading 1024 KiB/7.0 MiB
[....]
URL: https://subdomain.example.com/s/jtBi34LSskmSCND
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i use nextcloud-docker on the server, PHP upload limits are way beyond 1024 KB, and uploading the same files via nextcloud web interface works just fine. i don't know how to debug this properly, maybe you can give me some pointers?

thanks!