This topic has 4 replies, 3 voices, and was last updated 11 months, 1 week ago by Andrew. Author Posts June 11, 2019 at 8:49 am #25925 AndrewParticipant Trying to run the node development server component to modify the end user UI. Using Node 10.15.1 I he following error after running “npm run dev” “78% module and chunk tree optimization optimize-tree” and then it hangs. Any ideas what may be causing this? Thanks ANdrew June 11, 2019 at 7:38 pm #25927 jason.browneParticipant What version of NPM do you have (npm –version)? Did you also run npm install to make sure you have all of the dependencies? One easy method you can try is to delete your node_modules folder and package-lock file and try and rerun npm install. After that try npm run dev. Let me know if that works. This reply was modified 11 months, 3 weeks ago by jason.browne. June 18, 2019 at 3:38 am #25952 AndrewParticipant Microsoft fix resolved this. Reboot a Mac (??) and now works. Perhaps a resource conflict. June 26, 2019 at 9:01 pm #25992 vshankarParticipant Could you please revert what the Microsoft fix was. I’m also facing the same problem, your response is highly appreciated. June 27, 2019 at 12:33 am #25993 AndrewParticipant My sarcasm. “fix” for me was a reboot. I’d suggest the Mac was low on memory and not enough for the node instance to start up properly. Recommend as much free RAM as possible. Author Posts Viewing 5 posts - 1 through 5 (of 5 total) You must be logged in to reply to this topic.