Hi:
There seemed to be some issue with the perms at t.o community site (see message to the security list)
I've reviewed them and re-set to something more sensible, but for sure, more eyes and tweaking might be even more sensible, since I didn't have all the use cases of the community site in mind.
Feel free to pass by and improve!
https://tiki.org/tiki-objectpermissions.php
HTH
Xavi
P.S. I wonder whether this was due to a "Human error" or something else.