@stovensssa I’m sorry to hear that the admin dash panel isn’t working in WordPress. This seems like an issue either with the site permalinks or due to a plugin or theme conflict.
Please attempt to disable all plugins and use one of the default (Twenty*) themes. If the problem goes away, enable them one by one to identify the source of your troubles. I’d recommend doing these steps on a non-production website to ensure that the front end of the website isn’t affected by the changes.
To try to flush the permalinks, you’d typically be able to go to wp-admin/options-permalink.php on your site, click ‘save’ and it would refresh the rules and possibly resolve the issue. Since you can’t access that admin section, you may have trouble accessing that functionality. There’s also a WP-CLI command to reset the rewrite rules as well if you have access to run WP-CLI commands on your website.
I hope one of those suggestions can help you pinpoint and resolve the issue.