It seems invaluement.com change URL or just want us to stop using their dnsbl list.
So you can push ignore button for this list. We will see if we can fix it (or we will remove this dsnbl test from ynh)
EDIT: after reading their website, it seems they decided to ask for subscription for their dnsbl service. Prices start at 192$/year for less than 100 mailbox. So i just removed this RBL in next release.
See : [fix] Remove invaluement from free dnsbl list · YunoHost/yunohost@7148930 · GitHub