Problem in uploading wordpress theme

When I try to upload and install wordpress theme
I got this error message https://gyazo.com/eccf38363d50f468db60ae83454c0a29
Does anybody know how Can I solve this problem?

 

I am not sure, but I think it is happened because if you made manual changes to your template files such as the style.css file. So when you updated everything got overwritten with the default theme code.

 

Hi, try to add following code in functions.php
if (!function_exists('thefunction')) {
// ... proceed to declare the function
}
hope this will work for you. reference url: https://wordpress.org/support/topic/fatal-error-cannot-redeclare-add_term_meta

 

Thanks for the reply.

But it's not working