The most common reason you cannot upload an image is because it isn't an image.
Please do not try to upload a Microsoft Word document, or a PDF.
Please make sure the image you are uploading is either a PNG, GIF or JPG and less than 6MB and approximately 72dpi.
Eventfinda image specs are 780x336 pxls and will best display your event image if it is approximately this size.
Most issues occurring with image uploads is due to the size of the image being uploaded.