Title: Returns on Not Acceptable. Mod_Security error
Last modified: March 16, 2020

---

# Returns on Not Acceptable. Mod_Security error

 *  Resolved [taslimshah](https://wordpress.org/support/users/taslimshah/)
 * (@taslimshah)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/returns-on-not-acceptable-mod_security-error/)
 * I have added a premium plugin and it is showing this mod_security generated error
   while returning to the merchant site after completing the payment, it is coming
   on both live as well as sandbox mode.
 * > [View post on imgur.com](https://imgur.com/RqCcj2v)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [WebToffee](https://wordpress.org/support/users/webtoffee/)
 * (@webtoffee)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/returns-on-not-acceptable-mod_security-error/#post-12547648)
 * Hi [@taslimshah](https://wordpress.org/support/users/taslimshah/),
 * As you are a premium version user, please submit a ticket [here](https://www.webtoffee.com/contact/).
   This is a WordPress support forum for free version support.
 *  Thread Starter [taslimshah](https://wordpress.org/support/users/taslimshah/)
 * (@taslimshah)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/returns-on-not-acceptable-mod_security-error/#post-12547657)
 * Will you please help me to resolve this “Not Acceptable” mod_security generated
   error ?
 *  Plugin Author [WebToffee](https://wordpress.org/support/users/webtoffee/)
 * (@webtoffee)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/returns-on-not-acceptable-mod_security-error/#post-12547927)
 * Hi [@taslimshah](https://wordpress.org/support/users/taslimshah/),
 * This is a common error that comes due to some server related restrictions. We
   won’t be able to replicate it in our test sites or help you with it due to the
   same reason. You may please refer below links for reference on similar reported
   issues:
    [https://www.tipsandtricks-hq.com/apache-mod-security-update-how-to-fix-error-406-or-not-acceptable-issue-259](https://www.tipsandtricks-hq.com/apache-mod-security-update-how-to-fix-error-406-or-not-acceptable-issue-259)
   [https://infoinspired.com/helpful-tips/not-acceptable-this-error-was-generated-by-mod_security-solve-wordpress-login-issue-hostgator/](https://infoinspired.com/helpful-tips/not-acceptable-this-error-was-generated-by-mod_security-solve-wordpress-login-issue-hostgator/)
   [https://wordpress.org/support/topic/not-acceptable-mod_security-error-after-i-hit-allow/](https://wordpress.org/support/topic/not-acceptable-mod_security-error-after-i-hit-allow/)
 * You may contact your hosting provider for assistance regarding this. Do let us
   know if you need help from our side.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Returns on Not Acceptable. Mod_Security error’ is closed to new replies.

 * ![](https://ps.w.org/express-checkout-paypal-payment-gateway-for-woocommerce/
   assets/icon-256x256.gif?rev=3385064)
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 * [Support Threads](https://wordpress.org/support/plugin/express-checkout-paypal-payment-gateway-for-woocommerce/)
 * [Active Topics](https://wordpress.org/support/plugin/express-checkout-paypal-payment-gateway-for-woocommerce/active/)
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## Tags

 * [paypal express](https://wordpress.org/support/topic-tag/paypal-express/)

 * 3 replies
 * 2 participants
 * Last reply from: [WebToffee](https://wordpress.org/support/users/webtoffee/)
 * Last activity: [6 years, 1 month ago](https://wordpress.org/support/topic/returns-on-not-acceptable-mod_security-error/#post-12547927)
 * Status: resolved