new update crashed my site!!

I am having the same problem and am now losing money while I wait on my host to clear this up. I deleted the plugin via FTP but still get the fatal error.

Updated the plugin and crashed my blog. Seems like there is an issue with the recent release.

Mine too. Entire site, admin is down.

Same here, cannot access admin anymore Fatal Errors all around!

Downloading the error file points to Jetpack Lite and browsing though the changelog shows that now all of a sudden Jetpack itself should be installed too (!!!)

You might have added an update notice to make people aware and not just kill sites if they don’t have Jetpack installed. With more than 40K downloads it is your duty to inform your users when you make such dramatic changes to your plugin!

I though that the whole point of your plugin was not to have Jetpack installed? By now making it an Addon, I am seriously asking myself why I would want your plugin? How do I know what kind of impact Jetpack has on my site?

Bad practice this is and I will have to adjust my 5-star rating now.

Update
Even after installing Jetpack (if only to see what your “addon” does) it completely crashes the site.
Uninstall

I did get a message to make sure I had Jetpack installed which yes, does defeat the entire purpose of Jetpack LITE. However, I did install the regular Jetpack and then tried to update the LITE plug in and the site still crashed.

I had to get into my server files and delete the LITE plug in.

Unbelievable.

Same here. Even after installing Jetpack first, installing and activating Jetpack Lite causes the error described by the OP.

Assuming Jetpack Lite gets updated to fix this problem, is the new design philosophy going to be as lightweight as before? I’ll end up with two plugins instead of one. Is resource usage going to be heavier now that Jetpack Lite is suppressing most of Jetpack’s features instead of being slimmed down version of Jetpack?

Glad I looked here prior to updating. Don’t think I’ll update to version 3.0 (unless a solution is found in this thread). May need to stop updating this plug-in like I stopped updating All In One SEO Pack and still use version 1.6.15.3 of it.

Worst case, I can always look at Awstats and Webalizer in my webhost’s control panel.

I’ve given up on the jetpack lite plugin and have installed the Google analytics plugin instead https://www.ads-software.com/plugins/google-analytics-dashboard-for-wp/

i was a long time user of the jetpack lite but this latest update has made me move elsewhere

Thanks for the tip @morphman

Fatal error: Call to undefined function is_plugin_active() in /home/content/26/11868026/html/wp-content/plugins/jetpack-lite/jetpack-lite.php on line 12

is_plugin_active() function is present in WordPress since 2.5 as you all can see in the codex and min WP version requirement for the plugin is set to WP 3.1.

So… Which WordPress version are you using? Because the error you posted indicates that is_plugin_active() function is not present in your WordPress, and that only can happen if you’re running a very outdated WordPress version and not matching the requirement of the plugin.

I have Jetpack Lite running without any problem in dozens of sites running WordPress 3.8.

Assuming Jetpack Lite gets updated to fix this problem, is the new design philosophy going to be as lightweight as before? I’ll end up with two plugins instead of one. Is resource usage going to be heavier now that Jetpack Lite is suppressing most of Jetpack’s features instead of being slimmed down version of Jetpack?

When I created Jetpack Lite years ago, I did it as fork of Jetpack because no other method to do was available at that moment.

Fortunately, today Jetpack can be trimmed down without the need of making a fork. That’s why I changed the way Jetpack Lite do the work. In fact, now, Jetpack Lite doesn’t use any resource, it only says to Jetpack to only load the Stats and Shorlinks modules, so the other modules won’t load or consume any resource.

This way is much better, because now you don’t need to wait for me to update a whole new plugin when a new Jetpack gets published. So you’ll get updates to the modules you want to use faster than before.

You might have added an update notice to make people aware and not just kill sites if they don’t have Jetpack installed. With more than 40K downloads it is your duty to inform your users when you make such dramatic changes to your plugin!

The changes are informed in the upgrade notice and in the changelog. Your WordPress installation is your responsability not mine, so it’s your responsability to check changes before installing anything, to check requirements, or to have a way to rollback if something fails.

And, by the way, more than 200 people downloaded the plugin in the latest 24h and only 8 people are complaining (1 of them without even installing the plugin) here…

What about to stop a moment and think that maybe the problem can be in your side?? what about to read first and blame later? What about to have a little of respect for someone that brings his work and time to you without asking anything in return?

good luck with your plugin – your attitude to your users as just cemented my change to a different plugin

all the best!

ps, I know my way around WordPress!

@morphman Ok, you blame to me but dont provide the information I have requested to you about your WordPress version…

Then I’ll assume you’re running a WordPress version below the min. WP requirement as your error message indicates. And marks the thread as resolved.

Your attitude will make me to stop giving any support, because I’m tired of people like you that wants all for nothing and does not collaborate in any way.

Fatal error: Call to undefined function is_plugin_active() in /home/****/public_html/blogs/[blog title]/wp-content/plugins/jetpack-lite/jetpack-lite.php on line 12

My WP installation is on automatic update so I am running the latest version of WP (3.8).

This matter is unresolved. The error message appears whatever link I click in the WP Admin sidebar. Even closing the window and opening a new one (set to “wp-admin”) brings up the same error message.

Only “solution” was to enter via cPanel and delete the Jetpack lite plugin folder.

Too bad. Was a very useful little plugin.

FYI i’m using the latest version of WordPress – and i’m not blaming anyone, please read my original post I was actually reaching out for help.

But now kind of lost for words with the response I’ve received from you??

Not to worry I’ve moved on and by the way “who are people like me”

Your attitude sucks my friend!!

Under WordPress 3.8 I am getting the same notorious error with the update to jetpack lite 3.0:
Fatal error: Call to undefined function is_plugin_active() in /…/wp-content/plugins/jetpack-lite/jetpack-lite.php on line 12 Call Stack: 0.0011 1001944 1. {main}() /…/wp-admin/plugins.php:0 0.0016 1127784 2. require_once(‘/…/wp-admin/admin.php’) /…/wp-admin/plugins.php:10 0.0018 1156000 3. require_once(‘/…/wp-load.php’) /…/wp-admin/admin.php:30 0.0020 1179008 4. require_once(‘/…/wp-config.php’) /…/wp-load.php:29 0.0025 1326872 5. require_once(‘/…/wp-settings.php’) /…/wp-config.php:89 0.1772 35125040 6. include_once(‘/…/wp-content/plugins/jetpack-lite/jetpack-lite.php’) /…/wp-settings.php:210.

Only disabling jetpack lite via ftp brings up the wp-admin frontend again.

And the reason is definitively jetpack lite, since any other plugins (including a test installation of jetpack) are working well.

Btw, I like this plugin and its slim concept, but till this issue is fixed any further use will be impossible.

Greetz
tschaplin

P.S.: And to some people in this mail listing complaining in an inappropriate way to the author: please keep in mind, anybody making available plugins for free, is working at his/her best and providing a great service to the user community. So if you want to complain, then PAY.