Implanting the ENT wiki with anonyms access

We have SharePoint wiki site on anonymous access. We access document library on a web page added as web part. We group by enabled.

o First group by the column:

o Then group by the column:

When we access that doc library and click on first group its fine. But when we click on 2nd level its prompts for credentials even its anonymous for whole site.

Solution as follows.

$lockdown = get-spfeature viewformpageslockdown

disable-spfeature $lockdown -url https://sitecollectionURL

then toggle anonymous access.

For more details refer to this

If you're running an anonymously accessible MOSS website, especially an internet-facing one, you may have noticed that your SharePoint Forms pages are also accessible to anonymous users. For example, if you're using the publishing features, anonymous users might be able to get to https://SERVER/Pages/Forms/AllItems.aspx. Typically you don't want this, so how do you prevent anonymous users from accessing these pages?

In order to help with this, we provide a Feature out of the box called the ViewFormsPagesLockdown Feature, which we usually just call the Lockdown feature for simplicity. If you're experiencing this problem and want to lock anonymous users out of your Forms pages, then you can execute the following stsadm command on your farm:

 stsadm.exe –o activatefeature –url <site collection url> -filename ViewFormPagesLockdown

 https://blogs.msdn.com/b/ecm/archive/2007/05/12/anonymous-users-forms-pages-and-the-lockdown-feature.aspx