404 error when testing user profile page

Its because users page slug. change it to user or something else different then users slug cause it is used in users page.

Home buttons shortcode

<a class="btn btn-ask btn-default btn-lg" href="http://localhost/askbug/questions/ask/">Ask question</a> You can simply edit header.php to edit this manually.

Empty space on Notifications at the frontend menu

Add this to your style.css: body ul ul#ap-notification-dropdown li { width: auto; }

allow all users upload pictures

You can simply allow user to upload in AnsPress options -> permission

Child Theme Content Disappears

As you are using AnsPress RC version, hence copy anspress folder from askbug to askbug-child

submit time

You can try to changing this: https://github.com/anspress/anspress/blob/master/includes/functions.php#L215