Although you’ve followed all steps for view creation and you have set the right permissions you still have problem previewing your ContentBuilder view details at the frontend?
In case you have ContentBuilder and BreezingForms integration and the only thing you see at the frontend is [Form yourForm not found!] the reason is quite simple.
You are missing BreezingForms plugin which can be find inside installation BreezingForms folder. You can find it under the following path: /breezingforms_190_UNZIP_FIRST-2/extensions/addons/plg_breezingforms.zip
Install the plugin and make sure to enable it in Extensions > Plugins section.
You should work with your ContentBuilder view without any problems afterwards.