It is server related, I am now convinced. I use CoffeeCup forms to feed database tables and those sites with aliases, the form is failing. The message is
Failed to open database  SQLSTATE[HY000]  Access denied for user 'angbdb'@'localhost' (using password: YES).
This is a new site, so a fresh form, no old messes to clean up.
I realize this is outside of DW extensions help topics, but if anyone has any ideas what to look for on cPanel set up, I'd be grateful. I don't have any redirects on this new site set up. Just an alias.