I was working in the SharePoint 2013 OOTB “Task List” and developed a custom visual web-part for the “Newform.aspx” and “EditForm.aspx” , having all the control as present in the OOTB forms. (You must be thinking that why I developed custom forms, however this question is out-of-context for this blog). Since I was the site collection administrator, I never faced any issues while adding new items or editing the existing ones.
However, users who are having the “Full Control” or “Contribute” permissions at the task list level , reported that they are facing the following issue which says that they do not have permissions to add new items. On the first thought, it seemed to me a permission issue but I found that if I click on new item from my machine, they were able to open the form from their machines and can add new items in the task list ….Strange enough !!
Error message – “You don’t have Add and Customize Pages permissions required to perform this action”
1. Add a new permission level which only includes “Add and Customize Pages” permission, and then create a new SharePoint group with this permission level.
2. Add the users into the SharePoint group and these users will get the “Add and Customize Pages” permission from the site level (site permission).
If above solution does not work in your system, then give “Full Control” permission to the users at the Site Level.
Hope this blog helps many 🙂