Hello Adrian ,
The name of roles are very similar...
When I wrote, I made a mistake. So, could you please check again the configuration on "Maintain Regulation Role Assignment".
Entity:CONTROL
Role: SAP_GRC_SPC_SOX_CTL_OWNER instead of SAP_GRC_SPC_CRS_CTL_OWNER
Regulation: SOX
You can find more detail about this configuration on Security Guide.
Sorry about mistake.I hope the information I sent was helpful!