You do not have access to any forms

After I changed Maniphest Task Forms’s subtype to task, it can’t edit anymore.
The error shows:

You do not have access to any forms which are enabled and marked as edit forms.

Anyone helps, thank you!

Solved by config maniphest.subtypes
go to:
https://phabricator.bongmi.cn/config/edit/maniphest.subtypes/
set to below:

[
  {
    "key": "default",
    "name": "Task"
  },
  {
    "key": "dev",
    "name": "Dev Request",
    "children": {
      "forms": [
        1
      ]
    }
  }
]

Here Dev Request is my custom form, and 1 is default task form’s form id.