Core-js not working with Sequoia

I upgraded my Mac to Sequoia 15.6 (a minor update), and now my Meteor 2.16 won’t compile properly. I keep getting:

ecmascript-runtime-client.js?hash=332dca41947eee63af1ecccd8aeb06399de1032a:31 Uncaught Error: The core-js npm package could not be found in your node_modules 
directory. Please run the following command to install it:

  meteor npm install --save core-js

    at module (ecmascript-runtime-client.js?hash=332dca41947eee63af1ecccd8aeb06399de1032a:31:9)
    at fileEvaluate (modules-runtime-hot.js?hash=0990604f99408d08cb3a9ff8e3bbfa6692eb6570:388:7)
    at Module.require (modules-runtime-hot.js?hash=0990604f99408d08cb3a9ff8e3bbfa6692eb6570:270:27)
    at require (modules-runtime-hot.js?hash=0990604f99408d08cb3a9ff8e3bbfa6692eb6570:310:21)
    at ecmascript-runtime-client.js?hash=332dca41947eee63af1ecccd8aeb06399de1032a:398:15
    at ecmascript-runtime-client.js?hash=332dca41947eee63af1ecccd8aeb06399de1032a:403:3

I’ve definitely got it installed (core-js@3.45.0). Running the suggested install doesn’t help. I did meteor reset and that too was fruitless.

Thoroughly stumped here. Opened a github issue as well: GitHub · Where software is built

Anyone else encountered this?