Title: Activation error.
Last modified: September 29, 2016

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# Activation error.

 *  [Czarekplpl](https://wordpress.org/support/users/czarekplpl/)
 * (@czarekplpl)
 * [9 years, 10 months ago](https://wordpress.org/support/topic/activation-error-21/)
 * Hello.
    I got this error during Activation: Fatal error: Cannot redeclare class
   qrstr in /var/www/prettyname.cn/public_html/wp-content/plugins/wp-qr-code-auto-
   generator/phpqrcode/qrconst.php on line 50
 * I have Deleted all other qr code generators but an error still existing.
 * Can you help me to fix this error?

Viewing 1 replies (of 1 total)

 *  Plugin Author [Arka Roy](https://wordpress.org/support/users/arkaroy/)
 * (@arkaroy)
 * [9 years, 10 months ago](https://wordpress.org/support/topic/activation-error-21/#post-8320490)
 * Hello,
 * Sorry for the late reply. I think your issue is arising because you are using
   multiple qr code generators.
 * Kindly deactivate all qr plugins and delete the plugins (after deactivating the
   plugins). Then reinstall the plugin.
 * Waiting for your feedback.
 * Thanks
    -  This reply was modified 9 years, 10 months ago by [Arka Roy](https://wordpress.org/support/users/arkaroy/).

Viewing 1 replies (of 1 total)

The topic ‘Activation error.’ is closed to new replies.

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 * [WP QR Code Auto Generator](https://wordpress.org/plugins/wp-qr-code-auto-generator/)
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## Tags

 * [activate error](https://wordpress.org/support/topic-tag/activate-error/)

 * 1 reply
 * 2 participants
 * Last reply from: [Arka Roy](https://wordpress.org/support/users/arkaroy/)
 * Last activity: [9 years, 10 months ago](https://wordpress.org/support/topic/activation-error-21/#post-8320490)
 * Status: not resolved