I can not respond to this topic. Krikor sent me response.

I have not uninstalled k2 and reinstalled? No it is not the root folder. We use k2 for articles throughout the websites, so if k2 is being used on any of those websites then the error occurs.

Never uninstall K2 in order to update it, you will lose all your content.
Install the new version on top. To be extra sure that nothing goes wrong you can also backup prior to updating ( highly unlikely that anything goes wrong ).

I never uninstalled K2. I did however reinstall over what I had, but we already had the latest K2.

Can you paste the error here please?

Warning: require(/home/cohemplo/public_html/modules/mod_k2_content/tmpl/default.php): failed to open stream: No such file or directory in /home/cohemplo/public_html/modules/mod_k2_content/mod_k2_content.php on line 55

Fatal error: require(): Failed opening required '/home/cohemplo/public_html/modules/mod_k2_content/tmpl/default.php' (include_path='.:/usr/local/php54/pear') in /home/cohemplo/public_html/modules/mod_k2_content/mod_k2_content.php on line 55

Great, Now in the other topic, the question was about a specific file.
K2 would still be there, however the file in question (mod_k2_content/tmpl/default.php) is it there?

Furthermore, just to rule out a permissions issue, are your files permissions set to 644 and your folders to 755?

Since I have upgraded to Joomla 3.6 I am not going to see that. Can you tell me where I can find that in my Site Configuration?

I'm sorry I am not that savvy in Joomla as far as the backend. Where do I find (mod_k2_content/tmpl/default.php)? I am looking under folder permissions and the only thing not writable is the configuration.php.

You need to browse your file structure through an FTP client like Filezilla.

I was able to log in to the back end and the file you asked me about is there.