In your issuetype scheme you have the sub-task issuetype ?
If you have the issuetype, then check the validators in your workflows associateds to the subtask type.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
@Системный аккаунтcan you record some video or shared the error ?
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.