I'm using latest ISPConfig 3.1.15p2, which I upgraded some weeks ago. In the meantime also Debian 9 and php 7.0 had an update. Before updating ISPConfig to latest version (before pack 1) php and debian packages I've created a protected folder, which I now cannot access anymore. Today I created a new protected folder, with new user to this folder and it does not take any effect. Already checked DB for broken things, all OK. Used another browser and cleared cookie and cache, with same effect. Old protected folder cannot be accessed, new one protection does not take any effect. In the meantime the SSL-certificate of both folders (domains) renewed automatically (Let's encrypt) as well. What is wrong here ? How to debug this ?