I also had this problem today. I fixed it by un-boosting the app and then re-boosting it. Editing my watch.json file didn’t help - it just kept stopping at Installing...
@glitch_support might want to look into this since it seems to be affecting multiple users.
Sorry your are running into trouble with this and thanks for reporting. Can any of you share an example project in this stuck state? Is it happening to multiple projects you each have, or just one?
@dluxemburg This still seems to be happening to various projects of mine. I get them out of it by boosting and then unboosing - that’s the only way.
I don’t have an example that’s currently stuck in that state because I can’t afford to leave it in the state when visitors to the site are hitting gateway timeouts.