Cannot open Store of Office add-ins

[Tie CHENG]

For a while, I could not enter the Store of Office add-ins from my Excel for Windows. It returns the error "Cannot reach this page" as follows.

The internet works, the version of my Excel is as follows.

Does anyone know what is happening? 

[#2]

@Tie CHENG 

You are on enterprise subscription, as variant that could be blocked by your organization IT policies.