We upgraded to:

Search with Algolia
algolia/firestore-algolia-search@0.5.9

We are seeing this error:

ext-firestore-algolia-search-executeIndexOperation
Error when performing Algolia index { FetchError: invalid json response body at https://accounts.google.com/ServiceLogin?service=ah&passive=true&continue=https://uc.appengine.google.com/_ah/conflogin%3Fcontinue%3Dhttps://xxxxxx/extAlgoliaSearchCustomers reason: Unexpected token < in JSON at position 1 at /workspace/node_modules/node-fetch/lib/index.js:272:32 at process._tickCallback (internal/process/next_tick.js:68:7) message: 'invalid json response body at https://accounts.google.com/ServiceLogin?service=ah&passive=true&continue=https://uc.appengine.google.com/_ah/conflogin%3Fcontinue%3Dhttps://xxxxxxx/extAlgoliaSearchCustomers reason: Unexpected token < in JSON at position 1', type: 'invalid-json' }