I am using Magento2.1.9 getting this error in our console i am trying to different solutions but not fix it.please if any one know reply me
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 I ain't sure but I think its due to local storage, You can give a try to clear local storage data and clear cookie. It should work.anonymous– anonymous2019年03月05日 06:07:01 +00:00Commented Mar 5, 2019 at 6:07
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 yes but i m not clear every time in console any solution for other wayRv Singh– Rv Singh2019年03月05日 06:11:29 +00:00Commented Mar 5, 2019 at 6:11
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 After clearing local storage does error disappear ?anonymous– anonymous2019年03月05日 06:12:57 +00:00Commented Mar 5, 2019 at 6:12
1 Answer 1
It turns out that customer-data.js uses the localStorage to store a variety of stuff (probably for caching purposes). This means that when a module (or Magento) updates, you'd better make sure to flush your local storage as well.
Reference - You can find some more solution here :
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