Help in getting Child Table's value

Frappe Framework Custom Script
1

I was trying to fetch the value from child table and it was working fine but all of sudden it stopped.
Here’s my custom script:

var user
frappe.call({
method:"frappe.client.get_list",
args: {
   doctype:"Limit Editor",
filters: {"item_name":service_name},
parent: 'User',
fields:['parent','`tabLimit Editor`.limit']
       },
   async:false,
   callback: function(r) {
var data=r.message
for(var i=0;i<data.length;i++)
	{
	parent.push(r.message[i]['parent'])
	}
}
});

Here’s the traceback

Traceback (most recent call last):
  File "/home/frappe/frappe-bench/apps/frappe/frappe/app.py", line 61, in application
    response = frappe.handler.handle()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/handler.py", line 21, in handle
    data = execute_cmd(cmd)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/handler.py", line 56, in execute_cmd
    return frappe.call(method, **frappe.form_dict)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 1007, in call
    return fn(*args, **newargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/client.py", line 32, in get_list
    check_parent_permission(parent, doctype)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/client.py", line 367, in check_parent_permission
    raise frappe.PermissionError
PermissionError

Note- HAPPENING AFTER BENCH UPDATE

2

=> It mean your account dont have permission to access this doctype. Need to add permission this account to “Limit Editor”

3

@vinhnguyent090 how to give permission to a child table.