I am trying to export a Sentinel-2 (MSI) image which I downloaded as RGB and converted to NDVI (Bands B4 and B8). When exporting to KMZ (for Google Earth), it says the “Product has to be in Lat/Lon projrction”. Which steps have to be performed to convert to Lat/Lon ?

Actually the image on the left already looks reprojected. Have reprojected again the same map maybe? This might have caused an issue. Are the geolocations of the data correct before reprojecting?