TypeError: undefined is not an object (evaluating 'this._conversationsPromise.then')

[Reeywhaar]

We get a lot of errors that this._conversationsPromise is undefined when trying to call getSubscribedConversations on a channel. Let's take a look at getSubscribedConversations:

async getSubscribedConversations() {
    await this._ensureReady;
    return this._conversationsPromise.then((conversations) => conversations.getConversations());
}

Let's look how _ensureReady is defined in client.js of @twilio/conversations

this._ensureReady = new Promise((resolve, reject) => {
    this._resolveEnsureReady = resolve;
    this._rejectEnsureReady = reject;
 }).catch(() => void 0); // @todo How to process unhandled rejection here?

Well, it seems that there is a bug here and await this._ensureReady will never throw because you swallowed the error. Since you swallowed the error we get to the next line return this._conversationsPromise.... But we can't be sure that _conversationsPromise was set.

You should remove that catch on _ensureReady in Client constructor. At least users or your library would get the original error.

[berkus]

When you remove the catch, what is the error you get?

[Reeywhaar]

Also I think you should reset _ensureReady when disconnecting. I mean set _ensureReady to new Promise(... again

[Reeywhaar]

When you remove the catch, what is the error you get?

Didn't try yet but I suspect it is some connectivity error

[berkus]

Yep, ok, I will take a look at that part, thank you for reporting this!

[mmubasher]

Waiting for this fix