ArcMap Error Proxy

[Juan_ManuelAngel]

I have this problem with my ArcMap 10.5  and i have good network connection and y try to configure in my ArcGIS Administrator with portal and i get the same message, so if anyone can help me i will very grateful, look this is the error

Thank You

[Lake_Worth_BeachAdmin]

Hey there, check out this 

FAQ: How do I manage ArcGIS connections to online resources? 

Be sure everything is correct and check back. 

[Juan_ManuelAngel]

Thank you i will check that page,I just repair unistalling ArcMap 10.5 and Installing ArcMap 10.4.1 i dont know how my ArcMap 10.5 get crash with the connections.