Yes Lorenzo, it is related to uploading media. I will try doing what you said, “Adjusting the permissions” however, my ISP said they don’t allow writing to the shared server.
However the ISP also said there are many users with WP accounts using the shared server so there is a workaround to the writing problem, but they won’t tell me what it is.
I’ll try what you said and see if that works. If not, it’s probably the server issue that will need to be addressed.