User has 'add items' permission but cannot add item in the list

[itapps]

It is the permission the user has:

And the list advanced setting:

However, I cannot use "New" to add item.

After I press "New", it shows that I don't have permissions.

How can I fixed it?

[mnikitina]

Hello @itapps,

Please make sure that users have at least read permission to the Site Pages folder where all forms are stored.

[itapps]

it is fine now, but why it is needed to have read access to the site page?

[Stepan]

There is a PlumsailForms configuration for the forms. Check the Site Pages library, you will see the folder.