Hi,
I have the same issue while logging into ArcGIS Pro. I tried https://support.esri.com/en/technical-article/000022456 and edited registry. Currently I have ArcGIS Pro 2.5 and I installed 2.5.1 and 2.5.2 patches as well but still not working. Any idea what else should I try ?
I have ArcGIS for Personal Use License.