Fix error on get Blog article "AttributeError: 'Post' object has no attribute 'get_draft_url'"

File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 671, in resolve
obj = self.var.resolve(context)
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 796, in resolve
value = self._resolve_lookup(context)
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 858, in _resolve_lookup
current = current()
File "/usr/local/lib/python3.9/site-packages/cms/toolbar/toolbar.py", line 328, in get_object_draft_url
return self.obj.get_draft_url()
AttributeError: 'Post' object has no attribute 'get_draft_url'