Title: Error when installing plugin: Class wasn't loaded… Last modified: August 30, 2016 --- # Error when installing plugin: Class wasn't loaded… * Resolved [wpuser007007](https://wordpress.org/support/users/wpuser007007/) * (@wpuser007007) * [10 years, 9 months ago](https://wordpress.org/support/topic/error-when-installing-plugin-class-wasnt-loaded/) * Hi, * We’re running wp 4.3 and get the following error when installing the plugin “ class wasn’t loaded because it doesn’t implement the get_label method.”. Is this known or something a little more obscure? * thanks * [https://wordpress.org/plugins/stream/](https://wordpress.org/plugins/stream/) Viewing 7 replies - 1 through 7 (of 7 total) * [Luke Carbis](https://wordpress.org/support/users/lukecarbis/) * (@lukecarbis) * [10 years, 9 months ago](https://wordpress.org/support/topic/error-when-installing-plugin-class-wasnt-loaded/#post-6478921) * Hi wpuser007007, * This would indicate that you’ve got a plugin which implements custom connectors for Stream, which now need to be updated to work with Stream 3. * Happy to help with this process, if you can tell me which plugin is responsible. * [Randy Breland](https://wordpress.org/support/users/brelandr/) * (@brelandr) * [10 years, 9 months ago](https://wordpress.org/support/topic/error-when-installing-plugin-class-wasnt-loaded/#post-6478928) * I have the same issue.. It actually crashed a bunch of my sites. Plug in that it works with is wp-main child reports * [quietcity](https://wordpress.org/support/users/quietcity/) * (@quietcity) * [10 years, 9 months ago](https://wordpress.org/support/topic/error-when-installing-plugin-class-wasnt-loaded/#post-6478986) * Same problems – “class wasn’t loaded because it doesn’t implement the get_label method.” shows up as soon as I activate Stream. And it crashed a few of my sites when they upgraded to WP 4.3. * The cause is definitely the Stream plugin. When I logged into my server through FTP and delete the Stream plugin folder, the crashed site reappears. I could log into the WP admin and reinstall the Stream plugin, but then the error message appears. * Stream still looks like it’s working, but the message indicates that it’s not using the newest hook. * [Nolte](https://wordpress.org/support/users/moxiedeveloper/) * (@moxiedeveloper) * [10 years, 9 months ago](https://wordpress.org/support/topic/error-when-installing-plugin-class-wasnt-loaded/#post-6479002) * Same situation here. * Crashed a client’s site and error log reported issues regarding the stream plugin.“ class wasn’t loaded because it doesn’t implement the get_label method.” * Disabled the stream plugin and site was running back again. * Any further update on how to avoid/resolve this issue will be really helpful. * We had wp-main child reports plugin on the site, if that helps. * Thanks & Regards * [Luke Carbis](https://wordpress.org/support/users/lukecarbis/) * (@lukecarbis) * [10 years, 9 months ago](https://wordpress.org/support/topic/error-when-installing-plugin-class-wasnt-loaded/#post-6479008) * [@quietcity](https://wordpress.org/support/users/quietcity/) The get_label method is a method implemented by Stream 2. It’s implemented slightly differently in Stream 3. * What’s happening here is another plugin (from what I can tell the plugin is wp- main child reports, or other wp-main plugins) has implemented some methods which don’t work with Stream 3 (they were built for Stream 2). * I can’t find wp-main child reports anywhere – could anyone link me to where you got it? I’d like to reach out to the developer. If you could contact their support too, that could help. * (unless it’s MainWP, in which case, I’ve already reached out) * [quietcity](https://wordpress.org/support/users/quietcity/) * (@quietcity) * [10 years, 9 months ago](https://wordpress.org/support/topic/error-when-installing-plugin-class-wasnt-loaded/#post-6479010) * Thanks for the info Luke. * Yes, MainWP has an extension that relies on Stream to populate the client reports. They advised that users NOT upgrade to Stream v2 because of the cloud-based data, but now that Stream v3 is back on the local database, MainWP has recommended the update. But, there is obviously a bug to work out. In the meantime, I’ve reverted all installations of Stream back to 1.4.9. * Please keep us advised of any updates. * [Luke Carbis](https://wordpress.org/support/users/lukecarbis/) * (@lukecarbis) * [10 years, 9 months ago](https://wordpress.org/support/topic/error-when-installing-plugin-class-wasnt-loaded/#post-6479052) * I’ve looked into this, and discovered that it’s a problem on the MainWP end. I’ve already fixed the problem for them and sent them the fix. Just waiting for them to include it and release an update. * [https://github.com/mainwp/mainwp-child/pull/6](https://github.com/mainwp/mainwp-child/pull/6) Viewing 7 replies - 1 through 7 (of 7 total) The topic ‘Error when installing plugin: Class wasn't loaded…’ is closed to new replies. * ![](https://ps.w.org/stream/assets/icon.svg?rev=3128015) * [Stream](https://wordpress.org/plugins/stream/) * [Support Threads](https://wordpress.org/support/plugin/stream/) * [Active Topics](https://wordpress.org/support/plugin/stream/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/stream/unresolved/) * [Reviews](https://wordpress.org/support/plugin/stream/reviews/) ## Tags * [installation](https://wordpress.org/support/topic-tag/installation/) * 7 replies * 5 participants * Last reply from: [Luke Carbis](https://wordpress.org/support/users/lukecarbis/) * Last activity: [10 years, 9 months ago](https://wordpress.org/support/topic/error-when-installing-plugin-class-wasnt-loaded/#post-6479052) * Status: resolved