Hi,
I am using ArcGIS 10.3.1 (Portal, Server, Datastore) all on the same machine.
My server used to work very well until I couldn't publish anything anymore as hosted content to Portal (I can still publish to Server).
I had the same error message in ArcGIS Server logs.
The certificate authority is invalid or incorrect (WinINet ERROR_INTERNET_INVALID_CA, 12045), URL = ...
I followed the steps described above but it did not solve my problem. Things went from bad to worse.
I now have duplicated items in my Portal content and some of my layers are not able to be accessed publicly even though they are shared to everyone.
The error related to the certificate does not show up anymore but I am still unable to publish any hosted content to Portal.
Any idea on how to fix this ?
Thanks.