在我的heroku服务器上尝试collectstatic时，出现以下错误：
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
utility.execute()
File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/__init__.py", line 330, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/base.py", line 393, in run_from_argv
self.execute(*args, **cmd_options)
File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/base.py", line 444, in execute
output = self.handle(*args, **options)
File "/app/.heroku/python/lib/python2.7/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py", line 168, in handle
collected = self.collect()
File "/app/.heroku/python/lib/python2.7/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py", line 107, in collect
handler(path, prefixed_path, storage)
File "/app/.heroku/python/lib/python2.7/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py", line 305, in copy_file
if not self.delete_file(path, prefixed_path, source_storage):
File "/app/.heroku/python/lib/python2.7/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py", line 218, in delete_file
if self.storage.exists(prefixed_path):
File "/app/.heroku/python/lib/python2.7/site-packages/storages/backends/s3boto.py", line 414, in exists
return k.exists()
File "/app/.heroku/python/lib/python2.7/site-packages/boto/s3/key.py", line 539, in exists
return bool(self.bucket.lookup(self.name, headers=headers))
File "/app/.heroku/python/lib/python2.7/site-packages/boto/s3/bucket.py", line 142, in lookup
return self.get_key(key_name, headers=headers)
File "/app/.heroku/python/lib/python2.7/site-packages/boto/s3/bucket.py", line 192, in get_key
key, resp = self._get_key_internal(key_name, headers, query_args_l)
File "/app/.heroku/python/lib/python2.7/site-packages/boto/s3/bucket.py", line 230, in _get_key_internal
response.status, response.reason, '')
boto.exception.S3ResponseError: S3ResponseError: 403 Forbidden
在我的IAM用户策略中，我已将AmazonS3FullAccess添加到用户。
有人知道如何解决这个问题吗？
谢谢！