Hi Jackin
My name is Andre Da Costa; an Independent Consultant, Windows Insider MVP and Windows & Devices for IT MVP. I'm here to help you with your problem.
You likely need to adjust the permissions on the shared resourced to permit multiple users.
Right click the folder you are sharing
Click Properties
Click Security
Click Edit
Click Add
Click Advanced
Click Find Now
Select Everyone
Change the permissions to full
Click Apply then OK