Open your ipconfig.php file and put quotes around your password in the line that starts with DB_PASSWORD=
Let’s say my password is DB_PASSWORD=Invoice#"Pl@neIsGr3@t, then that new password line would become: DB_PASSWORD='Invoice#"Pl@neIsGr3@t'
Give it a try.
Also: Internal Server errors (500) would end up in a log somewhere.
The log for InvoicePlane is located in /application/log
There are no new logs in /application/log (all last year)
Here’s a link to a txt file containing both my ipconfig.php and .htaccess (database information and key removed). Maybe there is something incorrect there…?
Can you re-install 1.6.0 in a different directory?
Maybe, hopefully wjth a new database?
There must be error logs somewhere on your server. I’m very interested in the error logs.
Maybe not in /application/logs, but surely in the server’s own error log location
Find error logs
Re-install, because by accessing /newlocation/index.php/setup you’ll already know if InvoicePlane is loading