Hello Ahmed,

Your Problem

=============

• If you access any model record on website that time public user have no rights for directly access. So add sudo()  to access model record.

• Use sudo() to give super user rights.

• For Example,

• •  <t t-foreach="request.env['websoly_apps.websoly_apps'].sudo().search([])" t-as="WebsolyApp" />

Solution
=============

Try this below code, 

<t t-foreach="request.env['websoly_apps.websoly_apps'].sudo().search([])" t-as="WebsolyApp">

      <div class="appstore-i">

               <a href="#" >

                   <img class="appstore-image" t-att-src="'data:image/png;base64,%s' % WebsolyApp.photo"/>

                   <span><p class="appstore-name"><t t-esc="WebsolyApp.name"/></p></span>

                   <span><p class="appstore-download"><t t-esc="WebsolyApp.downloads"/> <i class="fa fa-download" aria-hidden="true"></i></p></span>

               </a>

           </div>

</t>

I hope my answer is helpful.

If any query so comment please.