2 Popes

No one said validly elected popes can’t be in error or even substantial error, as Canon 188 so plainly contemplates when it says: “A resignation made out of grave fear that is inflicted unjustly or out of malice, substantial error, or simony is invalid by the law itself.” Obviously, Benedict was in error to the extent he tried to expand the Petrine office and then divide it into active and passive ministries and only resign from the active component. The nouvelle théologie Modernists back in the 1970s and 80s were pushing this error and Benedict was one of its main supporters, even back then. So, as ridiculous as it may sound, Benedict himself has been teaching this stuff for many years in addition to other Modernists who don’t like the hierarchical/monarchical nature of the Papal office. But I digress.” https://catholicesquire.org/benedict-is-still-pope-a-response-to-edward-feser/