Overleaf: TypeError: i18n.use is not a function on Ubuntu 18.04

[neel]

I have used the docker-compose.yml template provided to launch a sharelatex instance. Its able to connect to mongodb and redis which is runing outside the docker container. I have forwarded http port to 5000 inside the docker-compose.yml

But I am getting 502 Bad Gateway repetitively .

In web.log I saw two packages i18next-fs-backend i18next-http-middleware were not present.
So I did cd /var/www/sharelatex and installed these two packeges through npm.

Now I see the following error

/var/www/sharelatex/web/node_modules/translations-sharelatex/app/js/translations.js:12
      .use(fsBackend)
       ^

TypeError: i18n.use is not a function
  at Object.setup (/var/www/sharelatex/web/node_modules/translations-sharelatex/app/js/translations.js:12:8)
  at Object.<anonymous> (/var/www/sharelatex/web/app/src/infrastructure/Server.js:31:57)
  at Module._compile (internal/modules/cjs/loader.js:778:30)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
  at Module.load (internal/modules/cjs/loader.js:653:32)
  at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
  at Function.Module._load (internal/modules/cjs/loader.js:585:3)
  at Module.require (internal/modules/cjs/loader.js:692:17)
  at require (internal/modules/cjs/helpers.js:25:18)
  at Object.<anonymous> (/var/www/sharelatex/web/app.js:26:16)
  at Module._compile (internal/modules/cjs/loader.js:778:30)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
  at Module.load (internal/modules/cjs/loader.js:653:32)
  at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
  at Function.Module._load (internal/modules/cjs/loader.js:585:3)
  at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
  at startup (internal/bootstrap/node.js:283:19)
  at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)

[kimbtech]

It seems that I have the same error, running also mongo and redis in a docker container.

[neel]

Reproduced with Ubuntu 20.04 too.

internal/modules/cjs/loader.js:638
    throw err;
    ^

Error: Cannot find module 'i18next-fs-backend'
  at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
  at Function.Module._load (internal/modules/cjs/loader.js:562:25)
  at Module.require (internal/modules/cjs/loader.js:692:17)
  at require (internal/modules/cjs/helpers.js:25:18)
  at Object.<anonymous> (/var/www/sharelatex/web/node_modules/translations-sharelatex/app/js/translations.js:2:19)
  at Module._compile (internal/modules/cjs/loader.js:778:30)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
  at Module.load (/var/www/sharelatex/web/node_modules/redis-sharelatex/node_modules/coffee-script/lib/coffee-script/register.js:45:36)
  at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
  at Function.Module._load (internal/modules/cjs/loader.js:585:3)
  at Module.require (internal/modules/cjs/loader.js:692:17)
  at require (internal/modules/cjs/helpers.js:25:18)
  at Object.<anonymous> (/var/www/sharelatex/web/node_modules/translations-sharelatex/index.js:1:18)
  at Module._compile (internal/modules/cjs/loader.js:778:30)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
  at Module.load (/var/www/sharelatex/web/node_modules/redis-sharelatex/node_modules/coffee-script/lib/coffee-script/register.js:45:36)
  at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
  at Function.Module._load (internal/modules/cjs/loader.js:585:3)
  at Module.require (internal/modules/cjs/loader.js:692:17)
  at require (internal/modules/cjs/helpers.js:25:18)
  at Object.<anonymous> (/var/www/sharelatex/web/app/src/infrastructure/Server.js:31:22)
  at Module._compile (internal/modules/cjs/loader.js:778:30)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
  at Module.load (internal/modules/cjs/loader.js:653:32)
  at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
  at Function.Module._load (internal/modules/cjs/loader.js:585:3)
  at Module.require (internal/modules/cjs/loader.js:692:17)
  at require (internal/modules/cjs/helpers.js:25:18)
  at Object.<anonymous> (/var/www/sharelatex/web/app.js:26:16)
  at Module._compile (internal/modules/cjs/loader.js:778:30)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
  at Module.load (internal/modules/cjs/loader.js:653:32)
  at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
  at Function.Module._load (internal/modules/cjs/loader.js:585:3)
  at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
  at startup (internal/bootstrap/node.js:283:19)
  at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)

[t4skforce]

Same error here on current docker build. Workaround for now in docker is to install the npm package "i18next-fs-backend"

cd /var/www/sharelatex/web/ && npm install i18next-fs-backend

[neel]

Tried that earlier. Installed both i18next-fs-backend and i18next-http-middleware. Got TypeError: i18n.use is not a function as mentioned in the first post.

[ShaneKilkelly]

Hi folks,

Thanks for the report. We are investigating, and will get this fixed as soon as we can.

[mserranom]

Thanks for the reports, this should be now fixed. Please pull the latest sharelatex/sharelatex:latest image (or sharelatex/sharelatex:2.4.1)