Amplify v6 - TypeError: Cannot read property 'decode' of undefined (underlying error response from `signIn` method) about amplify-js

[langerkirill]

@cwomack I added you as a collaborator to a sample repo where you can reproduce this issue yourself. You should be able to pull it down and follow the instructions I will add to the README to reproduce the issue. Thanks.

[langerkirill]

My issues were resolved by implementing the suggestion in the following comment:

aws/aws-sdk-js-v3#4877 (comment)

[cwomack]

@langerkirill, glad you found the workaround already! We'll mark this as a bug on our side due to the dependencies in our library on the aws-sdk. We're tracking this internally and will update this issue when a fix is released on our side that updates our dependencies.

In the mean time, if anyone comes across this same blocker please refer to this comment for a workaround.

[cwomack]

Hey, @langerkirill and thanks for opening this issue. The decode method in React Native is vended by base-64 package which is a dependency of @aws-amplify/react-native. Can you see if deleting your node_modules folder, as well as your package-lock.json file, then reinstalling dependences with npm install resolves the error?

If it doesn't, possibly verify you have the necessary dependency with npm why base-64 as well.

[langerkirill]

Hi @cwomack, thanks for the response. I tried deleting node_modules and yarn.lock, no luck. I got the same error. It does appear that I have base-64:

Mobile git:2890-slow-login ❯ yarn why base-64                                                                              ✹ ✭
yarn why v1.22.22
warning ../../package.json: No license field
[1/4] 🤔  Why do we have the module "base-64"...?
[2/4] 🚚  Initialising dependency graph...
[3/4] 🔍  Finding dependency...
[4/4] 🚡  Calculating file sizes...
=> Found "[email protected]"
info Reasons this module exists
   - "@aws-amplify#react-native" depends on it
   - Hoisted from "@aws-amplify#react-native#base-64"
info Disk size without dependencies: "20KB"
info Disk size with unique dependencies: "20KB"
info Disk size with transitive dependencies: "20KB"
info Number of shared dependencies: 0
✨  Done in 0.29s.

[cwomack]

@langerkirill, are you able to provide a sample repo possibly that can reproduce this reliably? We haven't been able to reproduce it on our side with a React Native app. Can you also clarify if you're calling Amplify.configure() at the root of your app as well?

[langerkirill]

@cwomack, we are unable to call Amplify.configure() in the root of our app because our app requires that users input a Facility ID on the first page which we then need to use to fetch information that we pass into the Amplify configuration. We have different userpoolid values for users in different regions for example. We need to configure Amplify on the second page before sign in. This was never an issue with v4. Do you think it may have become an issue for v6?

I will see about getting you a sample repo.

[langerkirill]

I found another error in the debug console mode related to an undefined URL.