Exception `ErrorException` thrown: `Attempt to read property "event" on null` - websocket

I want to use your Textalk/websocket-php package and I couldn't find any demo video or documentation to follow for implementing or using the package step by step. Can you please share if there is any demo video of how to use and implement the package? It will be really helpful and your help will be much appreciated. I am stuck at an error where I'm testing my websocket server with an extension from chrome. The connection gets established but when I send a message in request I get the error
"Exception ErrorException thrown: Attempt to read property "event" on null
anyID: exception ErrorException thrown: Attempt to read property "event" on null."
Here 'anyID" is my pusher key ID. And this error comes after
"anyID: connection id 85991897.886618360 received message: hi." in terminal. I am attaching a screenshot belowenter image description here

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Got an "INTERNAL ERROR" with getTaskClient(application,siteKey) method on Android app

according to the docs,I create the instance of recaptchaTasksClient with given method getTaskClient(application,siteKey),but I got this exception message "INTERNAL_ERROR",I don't know where goes wrong ,there is no further details about this error.
So I wanna know how this happens.Is there a solution to solve this?

Esper AMQPSource not receiving events

I'm trying to use the AMQPSource and I'm getting the error describe below, also imports are not working in EPL module. In advance, I test adding full package name to DistanceEvent (events.DistanceEvent and does not work).
To sending a message i'm using the publish Rabbitmq webadmin queue option with the next payload:
{"distance":33}
Could anyone help me?
The "IO-error deserializing object" is the reason you are not seeing data.
The "AMQPToObjectCollectorSerializable" expects the AMQP message to carry a valid JVM-serialized object however the "invalid header" means that the message content cannot be read by the JVM. Check the sender making sure it produces a AMQP message with a JVM-serialized object or may use replace "AMQPToObjectCollectorSerializable" with a deserializer that can understand your message. The code for "AMQPToObjectCollectorSerializable" can be found in Github if your are not sure how it deserializes.

Can you please identify in which case following error occurs in xamarin forms

I have created one xaml page with binding but at sometimes at time of page loading getting fallowing exception, it seems very strange.
Please suggest in which situation we can get this type of error.
Error:

Is MediaProtocolCommand.Listener onCompleted called when it fails to load a video?

I am on purpose sending a video with a format that is not supported to my receiver app. I see the following message on the chromcast console:
[ 8.188s] [cast.receiver.ChannelOverWebSocket] Sending message:
["ramp",{"cmd_id":1,"type":"RESPONSE","status":{"event_sequence":10,"error":{"domain":"ramp","code":-2}}}]
from ws://localhost:8008/session?20
How do I receive that on my android app? I know onComplete for the MediaProtocolCommand.Listener is called when the video plays fine. The description makes it sound like it would also be called when it doesn't play or am I reading that wrong?
I've also tried looking into the MediaProtocolCommand returned by mMessageStream.loadMedia on a separate thread in an infinite loop and it never gets its hasError set to true. So what am I missing?
Thanks.
It appears that the Cast Android SDK isn't parsing these error messages correctly. In the sample Android client, the following exception is thrown with an invalid video URL:
MediaProtocolMessageStream(9088): error parsing message:
{"type":"RESPONSE", "cmd_id":1,"status":{"error":{"domain":"ramp","code":-2},
"event_sequence":377}} org.json.JSONException: No value for state
This looks like a bug and should be reported to Google.

VSTS Error SerializationException

I tried debugging my code in team foundation server and I was receiving an error stating that
SerializationException was unhandled by user code and its description is Type is not resolved for member 'Microsoft.IdentityModel.Claims.ClaimsPrincipal,Microsoft.IdentityModel,version=3.5.0.0,Culture=neutral,PublicKeyToken=31bf3856ad364e35'. Please see the image for detail error.
Sorry, unable to post the image.
Thanks for your time.
I think you're missing a reference to Microsoft.IdentityModel, so it can't find code to do serialization/deserialization for part of an object.

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