Had the same issue trying to install 2.0 on Redhat:
Query failed: Table 'mibew2.locale' doesn't exist
Just before submitting this post, I realized the documentation was misleading/ incorrect. It's written for a sub folder, not running in the root URL, so in my case I had to hit URL/install.php as opposed to URL/mibew/install.php
Lesson learned, don't just follow the instructions, read them, understand them, adapt them as needed
Hope this helps others!