Top Layer Copper has unwanted artefacts

Hi, trying to upload a new design for ordering from the DKRED service. Project created in Altium Designer.

Have tried to generate the gerbers in a couple of different ways but both are showing incorrect copper on the top layer with unwanted artefacts and text that is not displaying properly. Viewing the same gerbers with other gerber viewers does not have this same issue.

Any advice on how to get the correct top layer copper? Everything else seems to be OK