Title: PHP error when installing and saving API details
Last modified: August 31, 2016

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# PHP error when installing and saving API details

 *  [tekhoi](https://wordpress.org/support/users/tekhoi/)
 * (@tekhoi)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/php-error-when-installing-and-saving-api-details/)
 * After entering api USER name and password and clicking save button, this error
   is displayed.
 * Server was unable to process request. —> Login did not succeed for user: [XXXXXX@apiconnector.com](https://wordpress.org/support/topic/php-error-when-installing-and-saving-api-details/XXXXXX@apiconnector.com?output_format=md).
   ERROR_INVALID_LOGINServer was unable to process request. —> Login did not succeed
   for user: [XXXXXXX@apiconnector.com](https://wordpress.org/support/topic/php-error-when-installing-and-saving-api-details/XXXXXXX@apiconnector.com?output_format=md).
   ERROR_INVALID_LOGIN
    Warning: Cannot modify header information – headers already
   sent by (output started at public_html/wp-content/plugins/dotmailer-sign-up-widget/
   DotMailerConnect.php:78) in public_html/wp-includes/pluggable.php on line 1228
 * [https://wordpress.org/plugins/dotmailer-sign-up-widget/](https://wordpress.org/plugins/dotmailer-sign-up-widget/)

Viewing 1 replies (of 1 total)

 *  Plugin Contributor [bsstaveley](https://wordpress.org/support/users/bsstaveley/)
 * (@bsstaveley)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/php-error-when-installing-and-saving-api-details/#post-7025488)
 * Hey,
 * This isn’t something we can replicate or experienced on other installs. Can you
   email your details over to [support@dotmailer.com](https://wordpress.org/support/topic/php-error-when-installing-and-saving-api-details/support@dotmailer.com?output_format=md)
   including your dotmailer account details and the team can investigate?
 * Many thanks,
 * Ben Staveley
    Product Manager

Viewing 1 replies (of 1 total)

The topic ‘PHP error when installing and saving API details’ is closed to new replies.

 * ![](https://ps.w.org/dotmailer-sign-up-widget/assets/icon-128x128.png?rev=2599209)
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## Tags

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

 * 1 reply
 * 2 participants
 * Last reply from: [bsstaveley](https://wordpress.org/support/users/bsstaveley/)
 * Last activity: [10 years, 3 months ago](https://wordpress.org/support/topic/php-error-when-installing-and-saving-api-details/#post-7025488)
 * Status: not resolved