Hi @Anonymous
In Portal management:
Under Security
1. Web Roles > Choose your web role > Related > Contacts> Make sure your contact is added to the web role
2. Hit save and close
3. Under Content > Lists > Choose your List > Make sure the "Enable Table permission" checkbox is ticked

4. Now under Security > Table Permission > Choose the relevant table > Associated to the list > Related > Add webroles
If everything is done.
In Design Studio
1. Press sync configuration and preview the website. And press "Ctrl+F5"
Hope it helps.
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