Http error 500

My website URL is:

When I reload the site I get a HTTP ERROR 500. This happened right after I was updating Wordpress to the newest version.

I followed the instructions on InfinityFree website and I could get a more specific issue error, which was:
Fatal error: Uncaught Error: Call to undefined function determine_locale() in /home/vol3_2/ Stack trace: #0 /home/vol3_2/ wp_default_scripts(Object(WP_Scripts)) #1 /home/vol3_2/ WP_Hook->apply_filters(‘’, Array) #2 /home/vol3_2/ WP_Hook->do_action(Array) #3 /home/vol3_2/ do_action_ref_array(‘wp_default_scri…’, Array) #4 /home/vol3_2/ WP_Scripts->init() #5 /home/vol3_2/ WP_Scripts->__construct() #6 /home/vol3_2/ wp_scripts() #7 /home/vol3_2/ in /home/vol3_2/ on line 1096

I don’t know what to do with this information. Please help.
I tried changing the nameservers to

That likely means the update broke and messed up your WordPress installation. But there is no need to worry, you can still recover the installation.

To fix this, you can download a fresh copy of WordPress of the specific version you were upgrading to: Download –

Then, you extract the archive on your computer and upload it’s contents on top of your existing website, overwriting any existing files.

That should ensure all the WordPress core files are present and compatible, and allow WordPress to fix itself from there.

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