Title: Call to undefined function GuzzleHttp\choose_handler()
Last modified: September 24, 2023

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# Call to undefined function GuzzleHttp\choose_handler()

 *  [pstretch](https://wordpress.org/support/users/pstretch/)
 * (@pstretch)
 * [2 years, 9 months ago](https://wordpress.org/support/topic/call-to-undefined-function-guzzlehttpchoose_handler-2/)
 * All backups are failing with this error:
 * ERROR: Exception caught in Error: Call to undefined function GuzzleHttp\choose_handler()
 * I’ve worked out it’s a conflict with the plugin SMTP2GO v1.5.6.
 * BackWPup 4.0.0
 * WordPress 6.3.1, PHP 8.1 (same error with 7.4 too)
 * I can see that others have had similar problems with other plugins using GuzzleHttp.
 * Any suggestions for a fix, please?

Viewing 1 replies (of 1 total)

 *  [happyAnt](https://wordpress.org/support/users/duongcuong96/)
 * (@duongcuong96)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/call-to-undefined-function-guzzlehttpchoose_handler-2/#post-17093476)
 * hello [@pstretch](https://wordpress.org/support/users/pstretch/)
 * this is a know issue which we are working on, will update you when I have something
   new.

Viewing 1 replies (of 1 total)

The topic ‘Call to undefined function GuzzleHttp\choose_handler()’ is closed to 
new replies.

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## Tags

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

 * 1 reply
 * 2 participants
 * Last reply from: [happyAnt](https://wordpress.org/support/users/duongcuong96/)
 * Last activity: [2 years, 8 months ago](https://wordpress.org/support/topic/call-to-undefined-function-guzzlehttpchoose_handler-2/#post-17093476)
 * Status: not a support question