i face this issue which is says about blocking cors policy and "it doesnot have have HTTP ok status

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              if (err) { return console.log(err); }
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  I get this error :

  core.js:15724 ERROR Error: Uncaught (in promise): TypeError: Cannot read property 'observateurlocal' of undefined TypeError: Cannot read property 'observateurlocal' of undefined
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  I am using Ionic-v4 and i have created an app in it. So I am designing all my pages of app in html/css and at last adding it to my ionic pages using tag.

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  I have removed all padding, margins and overflow from html.
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