Can not open image downloaded with download blocks as image funktion

When I download my blocks as an image I can’t open the Image when the image was downloaded after my project passed the 2000 block

It may help to try and arrange the blocks differently before trying to export. The challenge is that the various browsers have limits on the size of URLs, and we use a data URL to convert the canvas into a PNG file. Once the workspace becomes large enough, the size of the PNG exceeds the allowable length of a URL and the image gets truncated. By rearranging the blocks, you might be able to get better compression resulting in a PNG small enough that it will not overflow what the browser allows.