Solved: Uncaught ReferenceError: Base64 is not Defined in Magento 2.3

“Uncaught ReferenceError: Base64 is not defined.”

Replace the code of Uploader.php at vendormagentoframeworkFile

If you’re looking for the solution of Uncaught ReferenceError: Base64 is not Defined in Magento 2.3 that means, you have solved the error Count(): Parameter must be an array or an Object That Implements Countable in Magento 2.3 and then landed on this error!
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Solution for Uncaught ReferenceError: Base64 is not defined in Magento 2.3

Happened the same with me! Hence, I have posted the solution for the same here:

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You might have faced this error while uploading images from admin in Magento 2.3.
Thank you.
with the below code

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Ever faced an error in Magento 2.3 that says :

/**/

/*.mfp-bg{background:#000000d4}
/*]]>*/

/*.mfp-bg.mfp-ready{opacity:.6}
/*]]>*/

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