Assigned administrator permissions not being passed to new user

Site URL: https://www.creamhairassociates.co.uk/

Hi,

I'm carrying out some SEO work for my client who has added me as a site administrator two days ago. However, I am not able to access the code injection facility in the advanced options when editing the home page, see attached image.

Also, I get the following error when trying to access the email campaign marketing option. Not sure if this is related:

{"timestamp":1636722490883,"status":403,"error":"Access denied","message":"Access is denied","path":"/config/marketing/campaigns","errorId":"2dae835b-e30c-44f1-9a72-c50aa5daae68"}

I've attempted this in a chrome incognito window so there shouldn't be anything cached

Man thanks in advance

Nick