I am having the same issue. I have tried multiple times but I haven’t found anything that overcomes the ‘Error establishing a database connection’ message
Hi there! Do not forget to install phpMyAdmin too, since WordPress uses php. Then you will be able to end wordpress installation. The issue will come when you try to update WP, since php is outdated and WD has done NOTHING to solve it, and does not allow users to install the apps we need/want, as if our owned NAS still belong to them. I vaguely hope that they change their politics on this issues, otherwise many people will NOT upgrade their NAS anymore to WD ones, having others like Synology that has plenty of apps available at no cost.
I had the same issue last week, and after several attempts, I gave up. I was so angry and couldn’t understand what was going wrong. Then a friend of mine told me I should install PHPMyAdmin and log in via it. I did that, and it still showed me that the username and the password were wrong. Anyway, in the end, I decided to contact a developer, and he was able to help. If you wish, I can share with you his contacts. By the way, has anyone here ever used https://prosvit.design/wordpress-intranet/ before? Any thoughts?