Managed backup error out

Managed backup keep failing on every attempt with some empty response error.
https://static.livechatinc.com/8801096/P34JAOGBJ0/539e26570be0d70634a4ab102bc5a83d/Screen%20Shot%202018-02-02%20at%2023.39.50.png

Same for normal snapshot, except that snapshot will succeed if files excluded.
https://static.livechatinc.com/8801096/P34JAOGBJ0/16a67855ce133a483fc136f7af76b4fe/Screen%20Shot%202018-02-03%20at%2000.00.39.png