I made a logo for my student radio show on Illustrator and added a texture to the artwork. White texture showing through. Saved as PNG and it looked great. Uploaded to twitter and it looked great. Uploaded to the station website and the texture suddenly shows through as black!
Here it is on the site: https://www.camfm.co.uk/shows/world-town/
I am very new to all of this. Followed a tutorial on youtube.
Here is the original image: