Attachments not getting added when customers upload files from Portal Case form

[Saranya M2]

When customers try to add an attachment to a Case record from the Service Portal, the attachment is not getting uploaded or saved. This issue occurs only for customer users on the portal.

[Saranya M2]

Hi  SagnicDas_dev,

I have checked the ACLs for the sys_attachment and sn_customerservice_case tables. The user has read, write, create, and delete access; however, when submitting the ticket, the attachment is neither being added to the ticket nor appearing on the portal