How to Fix the HTTP File Upload Error in WordPress?

How to Fix the HTTP File Upload Error in WordPress?
Today, I encountered an HTTP error when uploading file (a pdf) to WordPress website. While editing a post or page, on clicking 'Add Media', the file seems to upload as the progress bar progresses but after a while WordPress shows HTTP error. In this post, I would like to share how I resolved or fixed the HTTP File Upload Error in WordPress.

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Issue importing WordPress database from development to live server: 1273 - Unknown collation: 'utf8mb4_unicode_520_ci'

So I was trying to import a MySQL database exported from local development machine to a live server and I got the error thrown by phpMyAdmin:

#1273 - Unknown collation: 'utf8mb4_unicode_520_ci'

On some systems, the error could be: Unknown collation: 'utf8mb4_unicode_ci'

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How to fix WordPress plugin update fail - Plugin update failed ?

Alright, so I had some notifications in a WordPress website to update some plugins, which is damn easy in WordPress. Yes, just click update and finish. But no, this time, a new situation had cropped up. On clicking on 'Update' from the interface, I got the message "Update Failed: Plugin update failed". I immediately turned to Google, searched for solutions others have tried for this WordPress plugin update failed error. Here are a few things findings and solution that worked for me. 

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Website not accessible? How to resolve "Server not found" issues when attempting to browse sites?

While attempting to browse some sites, we sometimes encounter the error "Server not found". For example, while attempting to browse YouTube, a Firefox browser might through the error -

Server not found
Firefox can't find the server at www.youtube.com ....

as shown in the image above.

How to resolve "Server not found" issues when attempting to browse sites?

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