Unaccessible folders after trying to set up ACL with groupListings


I tried to setup a container with read/write/control rights for a acl:groupListing but got locked out after trying to add a webID from another server. Maybe there had been just a typo, but access is now blocked by timeouts.

I want to setup permissions for https://base.solid.community/public/solidbase/admin/ so I created https://base.solid.community/public/solidbase/admin/.acl referencing a groupListing at https://base.solid.community/public/solidbase/admin/admins.ttl

How to proceed? Is it possible to contact someone to check the case from server side?