MY PAGE DOESN'T WORK

The error is fairly self-descriptive: there is a mistake on line 21 of the welcome-message.php file.

Did you (or anyone else) make changes to that file? If so….. not good. Never change anything directly in your theme files, but look into using a child theme instead.

If you didn’t make any changes, you’ll have to contact ThemeShop’s support theme. You’ve paid for it, and that should include support.

Schema is a commercial theme and the www.ads-software.com support forum can only help you with free themes from the WordPress theme directory.

Could you just tell me where I can find the welcome-message.php file on my laptop? how I search it, to delete the code that’s making this error?

It should be in your WordPress directory, in the folder /wp-content/themes/schema/functions/.

But please, don’t just go in and delete code, unless you really know what you’re doing. Perhaps you should download a fresh copy of your theme and overwrite your (changed?) welcome-message.php file with an original version, so you have an untouched file.

Either way, before you make any changes, please make a backup of your site first.

Is not… I don’t know what happen… doesn’t appear the folder of schema/functions/

I suggest you download a fresh copy of your theme and upload it to your server. If that still doesn’t work, you’ll have to check with the theme author and ask for support.