Same here, using 4.26 on Windows 10. I was following the Unreal Engine Blueprint Game Developer course on Udemy, and got the part where we’re supposed to package the app. I wanted to see what the button was doing, but then the editor froze completely. The task manager says the process is around 50% cpu, it’s been like that during well above 5 mins. The memory usage went up and down around 1.3GB, there was some disk activity too(peaks at 3MB/s). Then the memory usage dropped to 200 MB, and a popup appeared in the bottom right corned saying “Building executable for Windows…”. CPU is now down at 25% and memory usage around 150MB.