Another upgrade to 1.6 failing: Server starts, client throws errors

I’m working on an Ubuntu machine. I was on 1.4.4, upgraded to 1.5, and then 1.6. The app appears to start fine in the terminal, but when I go to it in the browser, I get the following. Any idea why?

ReferenceError: VIEW is not defined modules.js:12538:5
TypeError: Package["ecmascript-runtime-client"] is undefined ejson.js:21:5
TypeError: Package.ejson is undefined check.js:19:5
TypeError: Package.ejson is undefined id-map.js:18:5
TypeError: Package["ecmascript-runtime-client"] is undefined random.js:21:5
TypeError: Package.ejson is undefined mongo-id.js:17:5
TypeError: Package.ejson is undefined diff-sequence.js:18:5
TypeError: Package["mongo-id"] is undefined observe-sequence.js:19:5
TypeError: Package.check is undefined blaze.js:21:5
TypeError: Package.blaze is undefined ui.js:14:5
TypeError: Package["observe-sequence"] is undefined spacebars.js:17:5
TypeError: Package.blaze is undefined templating-runtime.js:18:5
TypeError: Package["templating-runtime"] is undefined templating.js:14:5
TypeError: Package.ejson is undefined iron_core.js:18:5
TypeError: Package.ui is undefined iron_dynamic-template.js:17:5
TypeError: Package["templating-runtime"] is undefined iron_layout.js:17:5
TypeError: Package["iron:core"] is undefined iron_url.js:18:5
TypeError: Package.ejson is undefined iron_middleware-stack.js:18:5
TypeError: Package["iron:core"] is undefined iron_location.js:22:5
TypeError: Package["diff-sequence"] is undefined minimongo.js:17:5
TypeError: Package.random is undefined retry.js:18:5
TypeError: Package.check is undefined ddp-common.js:17:5
TypeError: Package["ecmascript-runtime-client"] is undefined reload.js:18:5
TypeError: Package.check is undefined ddp-client.js:17:5
TypeError: Package["ddp-client"] is undefined ddp.js:14:5
TypeError: Package.minimongo is undefined allow-deny.js:17:5
TypeError: Package["allow-deny"] is undefined mongo.js:17:5
TypeError: Package.ejson is undefined reactive-dict.js:20:5
TypeError: Package["reactive-dict"] is undefined iron_controller.js:20:5
TypeError: Package.blaze is undefined iron_router.js:17:5
TypeError: Package.random is undefined localstorage.js:17:5
TypeError: Package.random is undefined accounts-base.js:20:5
TypeError: Package.random is undefined srp.js:17:5
TypeError: Package["accounts-base"] is undefined accounts-password.js:17:5
TypeError: Package["reactive-dict"] is undefined session.js:18:5
TypeError: Package.ejson is undefined logging.js:18:5
TypeError: Package.mongo is undefined vsivsi_job-collection.js:18:5
TypeError: Package.blaze is undefined anti_i18n.js:18:5
TypeError: Package["templating-runtime"] is undefined aslagle_reactive-table.js:17:5
TypeError: Package["templating-runtime"] is undefined rzymek_fullcalendar.js:18:5
TypeError: Package["templating-runtime"] is undefined dburles_google-maps.js:17:5
TypeError: Package.check is undefined edgee_slingshot.js:18:5
TypeError: Package.check is undefined aldeed_simple-schema.js:20:5
TypeError: Package["templating-runtime"] is undefined ephemer_reactive-datatables.js:17:5
TypeError: Package.ejson is undefined mrt_isolate-value.js:17:5
TypeError: Package["reactive-dict"] is undefined gadicohen_reactive-window.js:20:5
TypeError: Package["ecmascript-runtime-client"] is undefined webapp.js:21:5
TypeError: Package["ddp-client"] is undefined livedata.js:14:5
TypeError: Package["ddp-client"] is undefined dynamic-import.js:19:5
TypeError: Package.retry is undefined autoupdate.js:19:5
TypeError: Package.webapp is undefined dabblefox_sleekform.js:22:5
TypeError: Package["ecmascript-runtime-client"] is undefined http.js:22:5
TypeError: Package['iron:router'] is undefined global-imports.js:3:1
ReferenceError: meteorInstall is not defined app.js:1:5
TypeError: Package["accounts-base"] is undefined service-configuration.js:17:5
TypeError: Package.check is undefined mdg_validation-error.js:17:5