java.lang.NoClassDefFoundError: okio.Buffer

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java.lang.NoClassDefFoundError: okio.Buffer
at okhttp3.HttpUrl.percentDecode(HttpUrl.java:1454)
at okhttp3.HttpUrl.percentDecode(HttpUrl.java:1438)
at okhttp3.HttpUrl.percentDecode(HttpUrl.java:1444)
at okhttp3.HttpUrl.(HttpUrl.java:335)
at okhttp3.HttpUrl.(HttpUrl.java:278)
at okhttp3.HttpUrl$Builder.build(HttpUrl.java:949)
at okhttp3.HttpUrl.parse(HttpUrl.java:644)
at okhttp3.Request$Builder.url(Request.java:142)
at io.socket.engineio.client.transports.WebSocket.doOpen(WebSocket.java:64)
at io.socket.engineio.client.Transport$1.run(Transport.java:75)
at io.socket.thread.EventThread.exec(EventThread.java:50)
at io.socket.engineio.client.Transport.open(Transport.java:70)
at io.socket.engineio.client.Socket.probe(Socket.java:458)
at io.socket.engineio.client.Socket.onOpen(Socket.java:471)
at io.socket.engineio.client.Socket.onHandshake(Socket.java:512)
at io.socket.engineio.client.Socket.onPacket(Socket.java:485)
at io.socket.engineio.client.Socket.access$900(Socket.java:30)
at io.socket.engineio.client.Socket$5.call(Socket.java:299)
at io.socket.emitter.Emitter.emit(Emitter.java:117)
at io.socket.engineio.client.Transport.onPacket(Transport.java:127)
at io.socket.engineio.client.transports.Polling.access$700(Polling.java:17)
at io.socket.engineio.client.transports.Polling$2.call(Polling.java:124)
at io.socket.engineio.parser.Parser.decodePayload(Parser.java:251)
at io.socket.engineio.client.transports.Polling._onData(Polling.java:134)
at io.socket.engineio.client.transports.Polling.onData(Polling.java:106)
at io.socket.engineio.client.transports.PollingXHR$5$1.run(PollingXHR.java:113)
at io.socket.thread.EventThread$2.run(EventThread.java:75)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:838)

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