Solved: Count(): Parameter must be an Array or an Object That Implements Countable in Magento 2.3

Have you ever faced an error while uploading a logo, any image, or customer attribute image type from the admin side on Magento 2.3?

It says,

Warning: count(): Parameter must be an array or an object that implements Countable in Uploader.php on line 552 

If yes, relatable! I faced the error, fixed it, and am posting the solution here for my readers.

To solve the above error of Count(): Parameter must be an Array or an Object That Implements Countable in Magento 2.3, check the below solution:

Solution for Count(): Parameter must be an Array or an Object That Implements Countable in Magento 2.3

In the file-uploader.js, at pub\static\adminhtml\Magento\backend\en_US\Magento_Ui\js\form\element

Replace the code of function processFile with below code:

It is the pub\static file, so you can check by updating quickly.

You also need to update the main file
vendor\magento\module-ui\view\base\web\js\form\element\file-uploader.js

That’s it.

With the above method, you will get rid of the error.

However, you may face another error of Uncaught ReferenceError: Base64 is not Defined in Magento 2.3. Do not worry as I have posted the solution for the same.

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

If you have any doubts regarding this error, do mention them in the Comment section below.

I would be happy to help.

Feel free to share the solution with Magento community via social media.

Thank you.