Plugin Incompatibility with JetPack: PHP Fatal Error with wp_category_checklist

[jebs38]

I am running Events Calendar Pro with a Community Events Add on. I have been unable to get JetPack from Automatic to activate without problems. If I disable The Event Calendar plugins, I can get Jetpack to install. If I go back and activate all three EC plugins afterwards, I get error codes on the back-end and if a user tries to submit an event, they get a similar one on the front end. This breaks the functionality of my Community Events functions that are so important to my site. The back-end error code reads:

[Sun May 27 15:46:59 2012] [error] [client xx.200.247.xxx] PHP Fatal error: Cannot redeclare wp_category_checklist() in /nas/wp/www/staging/mysite.com/wp-admin/includes/template.php on line 64

I am running the latest version of WP and I have tested all of my plugins for compatibility issues and it only yours that are seem to be producing the error.

It is not essential that I use Jetpack, but it would be great if we could find a solution.

I did find this reference to problems with the wp_category_checklist in the WP core.trac:

http://core.trac.wordpress.org/ticket/16437

It seems that the function may have been deprecated but not retired from the codex. Is that true? Is there something that The Events Calendar Plugin uses this for? It isn’t what we use to choose a category in the submission form is it? (too logical?)

I would appreciate some help with this as soon as possible. It is a holiday weekend, but I am getting my site ready for a yearly big hit that is coming soon.

Thanks for your time,
John Stringfellow

[Rob]

Hey John. Thanks for the note here; I believe it was you whom I communicated with on Twitter over the weekend but let me know if I’m wrong there. I was just unable to recreate this on WP 3.3.2 with the tagged Events/Community releases (2.0.6 and 1.0, respectively) and Jetpack 1.3.4. Regardless of the combination in which I attempted to activate them I was unable to recreate your error. Is it possible your theme is somehow involved here? I’m working on default 2011, which seems to be best I can tell the biggest difference between our setups. Have you tried on default 2011 as well?

I’ve asked Jonah to take a look at the wp_category_checklist issue when he hits the forums this afternoon. While it seems like something else may be at play causing the Jetpack problem, it’d be good to get an answer on your question there. Stay tuned on that end and thanks for your patience so far.

[Jonah]

Hi John,

I have no idea what the issue could be here. I’ve created a ticket for another one of our devs to take a look. Stay tuned.

Thanks,
– Jonah

[jebs38]

Rob,
I will try the default theme on my test site.

Jonah,
Thanks for checking in.

Have you had any problems with wp_category_checklist before? Did either of you have any thoughts on this paragraph: It seems that the function may have been deprecated but not retired from the codex. Is that true? Is there something that The Events Calendar Plugin uses this for? It isn’t what we use to choose a category in the submission form is it? (too logical?)

John

[jebs38]

Rob,

It is not an issue with the theme, at least with the Jetpack issue. I changed the theme to TwentyEleven and there was no change. The same error code comes up.

I am working with Multisite. Could that have something to do with this?

Also, the checklist error is still showing.

John

[Rob]

Hey John. Thanks for the follow-up. As mentioned above, we’re going to need our dev Paul to comment on the wp_category_checklist issue. He should be taking a look at that today.

Thanks for confirming as much re: the theme. The multisite issue could be at play here; that sounds like the only difference between our setups. Do you have a non-multisite install on which you could give it a go, to see if you have the same experience I do?

[jebs38]

Rob,

Thanks for the concern that your company is showing with this issue. This gives me great confidence going forward in basing my site on your plugins.

I do not have a regular install right now, but I could do a setup and test it on one of my other sites. Let me check into that and get back with you.

Also, it will be great to have DevPauls input.

John

[moderntribe]

Hi, John!
It looks like the issue may have had something to do with a file that we were initially planning to use for the plugin that we no longer need to use. Our inability to recreate makes it hard to tell if the problem will *actually* be solved in the next release, but I’m about 90% confident that it will solve your problem. Our release should be coming soon, but let us know if you need the fix in the next couple of days and we can communicate via e-mail to try and solve your problem in the short term pre-release.
Thanks! I’m glad you’re enjoying using The Events Calendar and Community Events.

[jebs38]

Paul and Rob,

I was able to recreate the problem. It seems that the issue is when these [yours] plugins are already installed and you download and activate JetPack you get this error: Your Jetpack has a glitch. Something went wrong that’s never supposed to happen. Guess you’re just lucky: xml_rpc-32700
Try connecting again.

Error Details: The Jetpack server could not communicate with your site’s XML-RPC URL. Please check to make sure http://perfectchristmastree.org/xmlrpc.php is working properly. It should show ‘XML‑RPC server accepts POST requests only.’ on a line by itself when viewed in a browser and should not have any blank links or extra output anywhere.

I ran back through the setup again on deactivating your plugins, reactivated JetPack and then reactivated your plugins and everything seems to work fine. I cannot find any error codes. (this is a different setup and I am looking at the Control Panel Error Codes Page, as the other multisite install is a WPEngine install with a different error code reporting format.) I guess this is a rare Multisite/Jetpack/TEC issue?

John

[Rob]

Hey John: it’s definitely possible. Would you be interested in giving the pre-release code Paul mentions a go, to see if it resolves this issue? We’ll be releasing that next week if so…which means relief would be near.

If you’re interested shoot an email to pro /a/ tri.be and I’ll give it to you. We can dig deeper based on the feedback in your last message if Paul’s tweaks don’t fix things.

[jebs38]

Hi Mod,

I’m still having trouble getting Jetpack to work on my install. I have done the update, but that did not help.

John

[jebs38]

Dear Mod,
Hoorah, yeah for us. (OK, I’ll calm down now) The Jetpack issues are fixed and the site is much faster. Great job team.

Thanks,
John

[jebs38]

The fix came with running all three updates, not just the events cal update. Problems disappeared when all updates were activated.

[Rob]

Hey John: though my response is a bit delayed, I’m no less excited to hear that you got this resolved. It sounds like you’re all set upon activating the updates, but if you need anything else down the road do let us know. I’m going to close this thread for now.

[Author]

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