Try disabling anything that could stop it connecting , firewall and wireless security ( temporarily of course ) and try connecting again . If successful try changing the security key to something different to what has been used before ..
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This poetic animation about monsters is illustrated in a Van Gogh painterly style
Apple predictions 2017
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.