I tried to start a dev installation with htpasswd and found this typo.

radicale/config.py

@@ -53,8 +53,8 @@ INITIAL_CONFIG = {
         "type": "None",
         "public_users": "public",
         "private_users": "private",
-        "httpasswd_filename": "/etc/radicale/users",
-        "httpasswd_encryption": "crypt",
+        "htpasswd_filename": "/etc/radicale/users",
+        "htpasswd_encryption": "crypt",
         "ldap_url": "ldap://localhost:389/",
         "ldap_base": "ou=users,dc=example,dc=com",
         "ldap_attribute": "uid",