Link to a group does not work when a "deleted account" is accepted to be part of the group

**Describe the bug**

The link to this group I have created in the Decidim Barcelona instance does not work anymore.

**To Reproduce**

This group has been functional until I have done the following:

1. Go to "Manage members" ("My public profile" > "Groups" > "EscolaAngelsGarriga")
2.  Accept a new member from a "deleted account".

**Important notes**

The error is critical because it is the group that has created the most commented proposal in the participatory process of the Participatory Budget of Barcelona

Invisibilizing the group means putting at risk the equality of opportunities within the participatory process that has been restarted on March 1, 2021 in Barcelona.