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After upgrade to 2.10.x, link to category results in blank page with cat. title

  • regexaurus
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1 month 1 week ago - 1 month 5 days ago #173963 by regexaurus
regexaurus created the topic: [SOLVED] For 2.10.x, link to category results in blank page with cat. title
I have a site on DreamHost shared hosting:

<li>Joomla 3.9.13
<li>PHP 7.3.11 FastCGI
<li>Misc extensions, including Gantry 5.4.31, RokCommon 3.2.8, RokGallery Module 2.45, RokNavMenu 2.0.9, RokSprocket 2.1.26, Advanced Module Manager 7.12.3, etc.

With K2 2.9.0, I can follow a K2 category link, and a list of items in that category are displayed, as expected. After upgrading to K2 2.10.0 or 2.10.1, if I follow a K2 category link (or manually enter the URL for the category; same difference), I see a page with the category title/name, with blank body (no list of items in that category). Downgrading to 2.9.0 immediately resolves the problem.

Any ideas/suggestions?

Thank you!
Last edit: 1 month 5 days ago by regexaurus.

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1 month 1 week ago #173965 by Fotis
Fotis replied the topic: After upgrade to 2.10.x, link to category results in blank page with cat. title
This indicates that something breaks the output (with a PHP fatal error) which most likely indicates to a plugin. I recommend switching error reporting to maximum in Joomla's global configuration and then installing v2.10.1. When you load a category page, you should now see where the error occurs. Paste it back here so I can assist you further.

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1 month 1 week ago #173995 by regexaurus
regexaurus replied the topic: After upgrade to 2.10.x, link to category results in blank page with cat. title
Hi Fotis,

Thank you for responding!
I had already set error_reporting to maximum and debug enabled (1). I have the third-party extension, Additional Categories for K2, which results in "Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP..." when enabled. That's the only warning/error that appears. Before starting this topic, I had already disabled that extension (component + plugin) with no apparent effect (other than no more warning/error). The K2 category pages still appeared blank (except for K2 category title).
After you replied, I tried disabling many/most third-party extensions (components, modules, plugins) for testing/troubleshooting. Unfortunately this made no difference. I'm not sure what else to try...

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1 month 6 days ago #174022 by Fotis
Fotis replied the topic: After upgrade to 2.10.x, link to category results in blank page with cat. title
Completely uninstall "Additional Categories for K2". It's old, deprecated, requires hacking K2 and not supported anymore. Instead go for www.web357.com/product/multiple-categories-for-k2-joomla-plugin which is far better and actively supported.

Make sure you uninstall everything from "Additional Categories for K2", especially any plugins as these may cause the problem you have.

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1 month 5 days ago #174082 by regexaurus
regexaurus replied the topic: After upgrade to 2.10.x, link to category results in blank page with cat. title
Thank you, Fotis!

The trouble was related to "Additional Categories for K2." Apparently it's not compatible with K2 2.10.x. In my testing, at some point I created a new item and assigned it to a category that appeared blank (front end listing) after upgrading to K2 2.10.x. The new/test item appeared in the front end listing. Filtering items by category in the back end, I realized items that had been assigned a secondary/additional category no longer appeared in secondary/additional categories.
As you recommended, I purchased a "multiple categories" pro subscription. The extension is working well.

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1 month 5 days ago #174086 by Fotis
Fotis replied the topic: After upgrade to 2.10.x, link to category results in blank page with cat. title
Great :)

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