Sync issue for Apple

[Anburaj]

I configured the Realm object server in my iMac machine. I am trying to run this application in simulator, after successfully login my data is not syncing with server. I am getting the following errors.

2017-05-31 12:10:32.253686+0530 RealmDraw iOS[8687:72494] [MC] System group container for systemgroup.com.apple.configurationprofiles path is /Users/aaa/Library/Developer/CoreSimulator/Devices/6CEE9458-9EB0-460A-B375-262DE9A864DB/data/Containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles
2017-05-31 12:10:32.272156+0530 RealmDraw iOS[8687:72494] [MC] Reading from private effective user settings.
2017-05-31 12:10:48.938 RealmDraw iOS[8687:72831] Sync: Opening Realm file: /Users/aaa/Library/Developer/CoreSimulator/Devices/6CEE9458-9EB0-460A-B375-262DE9A864DB/data/Containers/Data/Application/5D998F4C-9A07-4618-91E3-3254942AD157/Documents/realm-object-server/72bdffc592380eb90db9808a909f7469/realm%3A%2F%2Fhttp%3A%2F%2Flocalhost%3A9080%2F%7E%2FDraw
2017-05-31 12:10:49.057 RealmDraw iOS[8687:72831] Sync: Connection[1]: Session[1]: Starting session for '/Users/aaa/Library/Developer/CoreSimulator/Devices/6CEE9458-9EB0-460A-B375-262DE9A864DB/data/Containers/Data/Application/5D998F4C-9A07-4618-91E3-3254942AD157/Documents/realm-object-server/72bdffc592380eb90db9808a909f7469/realm%3A%2F%2Fhttp%3A%2F%2Flocalhost%3A9080%2F%7E%2FDraw'

2017-05-31 12:10:49.058 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:10:49.179 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:10:49.871 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:10:49.874 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:10:51.453 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:10:51.456 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:10:54.287 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:10:54.290 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:10:58.785 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:10:58.787 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:11:07.575 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:11:07.578 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:11:24.900 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:11:24.903 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:11:54.205 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:11:54.208 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:12:43.282 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:12:43.285 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:13:35.373 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:13:35.402 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:14:33.450 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:14:33.473 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)
2017-05-31 12:15:27.300 RealmDraw iOS[8687:72831] Sync: Connection[1]: Resolving 'http:80'
2017-05-31 12:15:27.303 RealmDraw iOS[8687:72831] Sync: Connection[1]: Failed to resolve 'http:80': Host not found (authoritative)