python - "ERROR running Appium command: Cannot read property 'capabilities' of null" -

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when trying run basic hello world kind of test appium , python following error happened:

webdriverexception: message: url did not map valid jsonwp resource

looking further found happened when web driver initialized:

self.driver = webdriver.remote('http://localhost:4723/wd/hub',          desired_caps)

so typed in http://localhost:4723/wd/hub browser , got

that url did not map valid jsonwp resource

i googled, came across qa here on stackoverflow doesn't solve it. typed in http://localhost:4723/wd/hub/status

{     status: 0,     value: {         build: {            version: "1.4.11",            revision: "8cf8311f00e59a2b10fde1834fcf6d5ace6fbcd0"         }     } }

and wd/hub/session , got

{    status: 13,    value: "error running appium command: cannot read property 'capabilities' of null" }

sadly there few google results of these errors , results don't solve problem. if know how make them go away, please help.

fixed launching appium inspector (magnifying glass icon) in appium.app (on mac). appium issue.


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