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K2 version 2.8.0 on Joomla 3.8.1

I get the same errors with the default k2 template and recaptua disabled, and no more with error rerporting set to development.
Will have to look into this as it may need to be reported as an issue
Maybe Krikor has already seen it before

Hello,

Are you getting any JS errors in browser's developer tools console tab?

None

On the actual item page itself I get an error. In the k2.frontend.js the first line of code:Can't find variable: jQuery

When comparing this with previous versions of K2, there was a separate file k2.noconflict.js with a single line of code, which is exactly the same.

I've narrowed down the problem: when the jQuery handling settings in K2 are set to 'don't load jQuery', the error occurs. If you set jQuery to one of the other options, then it's fine. There is no need to load jQuery in Joomla 3. Turning this option on might result in conflicts between jQuery versions.

It is nice of you to support older versions of Joomla (1.5/2.5) with a feature like this, but we have to move on. We don't need to encourage site owners to stick with old unsupported and unsafe Joomla sites.

If this error occurs, then the template is not loading jQuery, not all J!3 sites load jQuery by default (this is the cause of this issue).
This is why this setting is mandatory across all Joomla! versions.

Thanks, that fixed it. I remember having to turn it on before!

I figured out that the jQuery Easy system plugin was set wrong. Strangely enough I didn't tough the settings for a long time. But maybe I recently set K2 to load no jQuery.

It was changed a few versions ago, not that long ago though.