/check_mk/api/1.0/domain-types/folder_config/collections/all throws a HTTP 500 error

Troubleshooting
2

I tested this in one of my systems and it was working.

curl -X GET "http://localhost:8080/cmk/check_mk/api/1.0/domain-types/folder_config/collections/all" -H "accept: application/json" -H "Authorization: Basic STRING"

Response

{
  "id": "folder_config",
  "domainType": "folder_config",
  "links": [
    {
      "rel": "self",
      "href": "http://localhost:8080/cmk/check_mk/api/1.0/domain-types/folder_config/collections/all",
      "method": "GET",
      "type": "application/json",
      "domainType": "link"
    },
    {
      "rel": "self",
      "href": "http://localhost:8080/cmk/check_mk/api/1.0/domain-types/folder_config/collections/all",
      "method": "GET",
      "type": "application/json",
      "domainType": "link"
    }
  ],
  "value": [
    {
      "rel": "urn:org.restfulobjects:rels/value;collection=\"all\"",
      "href": "http://localhost:8080/cmk/check_mk/api/1.0/objects/folder_config/f33bf7de7b874f9b985744ff4caca30a",
      "method": "GET",
      "type": "application/json;profile=\"urn:org.restfulobjects:rels/object\"",
      "domainType": "link",
      "title": "Test"
    }
  ],
  "extensions": {}
}

There is only one subfolder in the main folder and this one is shown in value.

If i set a non existing parent folder i get an other error message as shown in your problem.
But i looks like your problem is also a problem with an folder id and that the systems finds a folder without id what normally not could be.

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