Cannot change sharing setting of any arcgis enterprise item

[OsgurMcDermott_Long]

Hi

I do not have any options to change the sharing of any of my items in ArcGIS Enterprise. The following is all that pops up for me when I click access 

I can change access other ways but I would like to be able to achieve this in portal for arcgis 10.8 

#arcgis enterprise 10.8‌

#sharing in portal‌

Thanks in advance, 

[OsgurMcDermott_Long]

An update to this is that I can share items as normal on the hosting machine but the same functionality is not available if accessing the portal from a different machine.