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I have an issue with a clients site. I installed the Yoast SEO-plugin (which i find to be great), but when i activate it i get lot's of error messages (See below).

/storage/content/10/104610/mydomain.com/public_html/wp-content/plugins/qtranslate/qtranslate_hooks.php on line 54 Notice: Undefined index: language in /storage/content/10/104610/mydomain.com/public_html/wp-content/plugins/qtranslate/qtranslate_hooks.php on line 55 Notice: Undefined index: language in /storage/content/10/104610/mydomain.com/public_html/wp-content/plugins/qtranslate/qtranslate_hooks.php on line 61 Notice: Undefined index: in /storage/content/10/104610/mydomain.com/public_html/wp-content/plugins/qtranslate/qtranslate_hooks.php on line 61 Notice: Undefined index: language in /storage/content/10/104610/mydomain.com/public_html/wp-content/plugins/qtranslate/qtranslate_hooks.php on line 111 Notice: Undefined index: language in /storage/content/10/104610/mydomain.com/public_html/wp-content/plugins/qtranslate/qtranslate_hooks.php on line 111

This error message appears with every SEO-plugin i've tried What causes this, and how can i solve it?

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closed as off-topic by Pieter Goosen, birgire, cybmeta, Mark Kaplun, gmazzap Nov 27 '14 at 14:58

This question appears to be off-topic. The users who voted to close gave this specific reason:

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up vote 1 down vote accepted

As the errors tell you it is caused by badly written code.

What you can do: Ask the qtranslate developer to fix these issues, file a proper bug report and add the errors to it. Then wait for an update.

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