Fatal error: call to undefined function?? please advise

To be sure, this was a working site, and this error just started? Where you already using this theme? Have you tried deleting the theme, and trying another? Reupload a fresh version after deleting?

this was a working site, yes, for about a month.

I was using the blix theme, and have used it the entire time.

I have not deleted the theme.

I can’t even access my wp-admin site.

Do you have ftp access? If so, you can delete the theme via ftp, and see if that fixes the problem.

ok, I deleted the theme, and now I am getting a 404 error. But I am still unable to access my wp-admin. Where from here?

But your WordPress install is all there? This might be an issue for your host.

ok, it was an issue with my host. Now, I am able to pull up my website, but not able to access wp-admin

What was the issue. Obviously it’s not completely fixed yet.

the host domain desination was changed to /wp-content/themes/blix/index.php.

I changed it back to the root directory index.php.

Still not working with this arrangement.

I’m confused. Who changed the destination and how?

me too. I don’t remember changing that. Which file should be the destination?