Think I might have solved it.

Somehow in upgrade the date format in the language file (en-GB.com_k2.ini) got messed up?!

I've manually edited it for now using PHP date formats and it appears to have worked.

Have you cleared all caches after the upgrade? I mean Joomla cache, your browser's cache, server cache if there is any and Cloudflare cache if you use Cloudflare. I had similar issues, where the calendar looked funky and it didn't work well. Cache was the issue.

Hello Wai,

I would suggest asking the K2 Filter devs as well so they can provide a patch.

Hi, Fransisco,

Thank you very much for your posts. Indeed, that solved my problem. No need to apology.

BTW, which version of JA K2 filter are you using? Will the latest version (1.2.8 according to Joomlart) fix this problem?

Thank you very much.

Wai

Sorry,

This issue is not a K2 problem.

I disabled the Joomlart plugin ja_k2_filter and now, all work fine.

Regards and sorry one more time

This is not directly related to K2.
Some items might have been saved or imported incorrectly.
We cannot alter existing items.

Using Joomla 3.75, PHP7.0 and new install of K2 v2.8, after importing Joomla Content.

When accessing the imported content results in 0 Error decoding JSON data: syntax Error.
Note: The error did not occur until after the installation of K2.

One explanation of the issue is:
The Issue
Joomla stores rules and parameters in the database in JSON format. Previously, if that data was invalid JSON it would silently fail and the site would continue working.

In the 3.6.3 update, the validation of the syntax was improved, so issues that would previously go unnoticed now result in an error page with the aforementioned error message.
Known Causes

JBLibrary plugin - Causes errors on the frontend of the site, fixed in version 2.1.7
Jupgrade - Sites migrated from Joomla 1.5 using this extension.
Many other 3rd party extensions and core extensions have been mentioned.

How to Fix

Sites that have been migrated using Jupgrade may have empty parameter fields set as {""} which should either be {} or {"":""} to be valid syntax. This may be the same with other 3rd party extensions added to any site.

This is the easiest issue to fix and can be done with a simple search and replace on the database.
reference:
www.robertwent.com/blog/fixing-json-data-errors-after-updating-to-joomla-3-6-3/

After upgrade to version K2_v2.8.0 in the module mod_k2_content images disappeared.

No extension to file.
/html/mod_k2_content/latest/default.php
Error code
Code without error


1 photo before updating
2 photo after updating
3 photo after edit file /html/mod_k2_content/latest/default.php
But the design of the module changed, although the images appeared.
How to fix?? Thank you

Fairly sure the bottom one was finished pre upgrade, both tops ones just refuse to make the image stick.

I cannot verify the issue as well.

Try clearing all your caches.
A file might have been cached by your browser.
Also, are you using any 3rd party K2 extensions?

Hello,

i have upgrade my site to joomla 3.7.5 and K2 2.8.

After the update the "published date" info is not good. See my screenshot.

Anyone an idea what is going wrong here?

Check the screenshot: http://imgur.com/a/BIVAB

I'm having this issue after upgrade to 2.8.0

After some little debugging, I found the extra fields HTML code is there in the source code, but it is hidden for some CSS issues.

I think it is a simple UI issue after replacing most of the UI elements in this new release.

I will try to find a fix asap.

I believe this started happening with the latest k2 upgrade. I have20 + menu links set up to display articles with a particular k2 tags. All of a sudden 3 of these menu links are throwing a 500 error. The rest work fine. They are all going to the same k2 category. I have double checked that the settings are the same. Turning on error reported does not give me anything more than the 500. I put a ticket into the host and they cannot get a better error message and they advised I put a ticket into k2. I tried changing the layout parameters from default to most recent as described in one of the threads in this forum but no joy. Any help would be greatly appreciated.

I believe this started happening with the latest k2 upgrade. I have20 + menu links set up to display articles with a particular k2 tags. All of a sudden 3 of these menu links are throwing a 500 error. The rest work fine. They are all going to the same k2 category. I have double checked that the settings are the same. Turning on error reported does not give me anything more than the 500. I put a ticket into the host and they cannot get a better error message and they advised I put a ticket into k2. I tried changing the layout parameters from default to most recent as described in one of the threads in this forum but no joy. Any help would be greatly appreciated.

NOTE: ALSO whenever I try to submit this with a hyperlink to a page that is getting the error, this post gets a rejected saying potentially spam.

I am running J 3.7.5 and K2 2.8
I assume you are talking about the back end of K2
I do not have the error
Check Extra Fields, Extra Fields Groups, Extra field group assigned to the Category
If all is correct and you are missing extra fields on old items, what happens when you create a new item in a category with extrafields assigned to it.

I have just upgraded my site to K2 2.8.0 (running Joomla 3.5.7).

The Extra Fields tab on the item editing page became empty.

On the Chrome Browser developer tool console, I find the following error:

index.php?option=com_k2&view=item:345 Uncaught ReferenceError: Calendar is not defined
at HTMLInputElement.<anonymous> (index.php?option=com_k2&view=item:345)
at Function.each (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:2)
at a.fn.init.each (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:2)
at Object.success (index.php?option=com_k2&view=item:342)
at i (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:2)
at Object.fireWith [as resolveWith] (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:2)
at y (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:4)
at XMLHttpRequest.c (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:4)

How can I fix it?

Thanks.

Wai

Hello,

I have installed:
Joomla 3.7.5
K2 2.8
PHP 7.0
DJ-media tools 2.9.5 (paid version)

When I try to create a new album in DJ-Media, I get errors in the DJ-tools New Album Create Page interface:
1) You browser doesn't support Gears, BrowserPlus, HTML5, Flash, Silverlight and even HTML4! Please upgrade your browser!
2) Error, 0 Call to undefined method K2HelperHTML::loadjQuery()


If I turn off component K2, then the DJ-media tool is working fine.
Also DJ-media tools normally worked on previos version K2.7.1, before update

What needs to be corrected in K2 2.8, that would be DJ-media tools worked?

Hi,

Thanks for following up on this.

I'm wondering if my upgrade went bad or something, since I still had these files in my structure, despite upgrading from the Joomla Extensions/manage/Update route.

I've now downloaded the 2.8 zip & installed that over K2 using Extensions/manage/Install route.

K2 now says it's running 2.8 -> (Last update: August 18th, 2017 - Version 2.8.0)

However, I'm still getting fatal errors on save:

Warning: require_once(/home/.../public_html/administrator/components/com_k2/lib/class.upload.php): failed to open stream: No such file or directory in /home/..../public_html/plugins/system/k2multiimages/K2MultiImages/administrator/models/itemmultiimages.php on line 5

Fatal error: require_once(): Failed opening required '/home/.../public_html/administrator/components/com_k2/lib/class.upload.php' (include_path='.:/usr/local/php70/pear') in /home/.../public_html/plugins/system/k2multiimages/K2MultiImages/administrator/models/itemmultiimages.php on line 5

However, disabling the k2multiimages plugin allows me to save items. Perhaps this extension needs updating to account for the removal of class.upload.php from the lib folder?

Thanks again for your assistance - much appreciated.

Regards,
Eddie

I just want to also give my opinion: THANK YOU all K2 Team, you rocks! I have just finished upgrade 4 websites with K2 without an issue, thank you so much for that!

Hi,
There is another instance of class.upload.php in /media/k2/assets/vendors/verot/class.upload.php/src/
Removing the directory leads to another fatal error - missing the verot version of class.upload.php

This issue has only arisen since updating K2 to 2.8. The verot class was updated as part of the k2 2.8 upgrade.

Kind regards,

hy,
upgraded today to latest joomla version and K2 version.
Error persists :-(

Please advise as the site as is is unusable for our purpose if editors cannot use frontend editing.

Best regards
Thomas

The security issues relate to elFinder, the JS widget used for the media manager. And yes, you should upgrade.