What happens with my ArcGIS Pro, when I start it I receive the following error:

and after I click OK, it sends me the screen:

I tried to fix it by this way:
https://gis.stackexchange.com/questions/183730/unable-to-establish-connection-to-www-arcgis-com-from-arcgis-pro
but it is not work for me. my internet connection is no problem and I can access to www.arcgis.com but my arcgis pro can't start without those errors.
Could anyone can help me?