This is a spectacularly bad idea. If the Cardinal actually goes in there, he should have a Rosary in one hand and a Crucifix in the other the whole time, recite the St Michael Archangel prayer going in, and the Exorcism Prayers completely while there.
If you go to their website, parliamentofreligions.org, you will find that Pope Francis sent a representative and message to the 2021 conference. The following web page shows the 2021 speakers, etc.
https://parliamentofreligions.org/2021-virtual/the-2021-parliament-convening-report/