WordPress login redirecting to wp-admin/install.php even after installing

I’m having major issues my wordpress website and to admin login. I have had a website for 4 yers without issues, however I decided to redesign my website and now it’s not working properly. When I log into wordpress, it will randomly redirect redirected to wp-admin/install.php. I tried the common solutions:

Clear Your Cache and Cookies of browser,

– disable .htaccess
– disable all plugins
– disable theme
– adapt wp-config.php:
define(‘WP_HOME’,’https://example.com’)
define(‘WP_SITEURL’,’https://example.com’)
– Check/restore tables of database
– Checked all the table prefixes for errors

Nothing worked, worked so I decided to reset my database and start from scratch. Unfortunately, I’m still the same issue that appears, the websites randomly redirecting to wp-admin/install.php.

I even contacted my server host to ask if they are having issues. My host is FatCow and they say there are no issues. They replied that my query limit was exceeded. This is not true because I’m running at about 30% of my limit.

Does anyone have a solution? Is it WordPress or could it be the server host?

Thanks in advance & kind regards!