SPARUL INSERT access denied even after granting update permission

I have a Virtuoso server running on a remote machine and can access the conductor UI by logging in as dba user. I have created a graph using Linked Data → Quad Store Upload on which I am able to run select SPARQL queries from Linked Data → SPARQL. However, when I run INSERT DATA query I am facing the following error.

Virtuoso RDF02 Error SR619: SPARUL INSERT access denied: database user 108 (SPARQL) has no write permission on graph http://localhost:8890/dummy

I have checked on System Admin → User Accounts that the users SPARQL/dba have SPARQL_UPDATE, SPARQL_SELECT role. I have checked Linked Data → Graphs → Roles Security and it seems fine. I have the same setup on my local machine on which I initially faced a similar permission issue but after granting roles SPARQL_UPDATE, SPARQL_SELECT role it was resolved.

Please suggest how can I avoid this error.

What are the versions of the two Virtuoso servers in use here for comparison, as if both are the same version and setup the same then they should exhibit the same behaviour …