JMeter: java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "Õ­"

I am getting the following exception for a login page in Response Code:

java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "Õ­"
        at java.net.URLDecoder.decode(Unknown Source)
        at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sendPostData(HTTPHC4Impl.java:1151)
        at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.handleMethod(HTTPHC4Impl.java:453)
        at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:329)
        at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:74)
        at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1146)
        at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1135)
        at org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:434)
        at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:261)
        at java.lang.Thread.run(Unknown Source)