gavintyte

Thanks – I don’t think so (even though I’m not clear why it worked). I’m going to add the plugins back in one by one. I’ll close the topic. Thanks esmi.

Okay – getting somewhere. I deleted everything in my content folder (pretty much) and the install database is now successful. I will now try and re-populate the content.

Yes. The file cache.php is there in wp-admin/includes.

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I’ve checked it and it appears to be defining the function… e.g.

function wp_cache_add_non_persistent_groups( $groups ) {
// Default cache doesn’t persist so nothing to do here.
return;
}

It has permissions set to 644.

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I tried that earlier but it didn’t seem to make any difference. I will try again in the morning (need to sleep now – been up since 4am this morning). Thanks.

No, I’m afraid that didn’t work.

I still get the message:

Fatal error: Call to undefined function wp_cache_add_non_persistent_groups() in /home/uplymech/public_html/wp-includes/class-wp-theme.php on line 177

when trying to do a Database Update.

I did not overwrite the old files and folders. I deleted the old files and folders and uploaded the new files.

(I deleted all the files on the server before uploading the new files)