Error Call to undefined method GuzzleHttp after updating to the latest version

Hi,

There is probably a plugin or theme that depends on the package “Guzzle” but is using a version below 7.0. The Svea-connection depends on Guzzle 7.8.0. Since the package (Guzzle) will only be loaded once, this other plugin/theme is probably initialized before our module and creating issues with the Svea connection.

See if you can find which other package is using Guzzle and if they have an updated version that depends on Guzzle >7.0.

Are there issues with payments that you’ve seen together with this error message?

Kind regards,
The Generation

Thank you, we didn’t notice the other issues except this one.
I will update all plugins and let you know.

Okay that’s good to know. Great!

I found two plugins that use Guzzle (Yoast Seo and SMTP Mailer), updated them but the problem remains. Both these plugins use for Guzzle ‘vendor_prefixed’ folder, so it shouldn’t be the reason?

Sorry, I found the other plugin which use Guzzle, when I update it I will let you know.

Hi, I have updated the last plugin which use Guzzle, and from now on I get new error:
PHP Fatal error: Uncaught Error: Undefined constant GuzzleHttp\ClientInterface::MAJOR_VERSION in /www/expofyse_725/public/wp-content/plugins/svea-checkout-for-woocommerce/vendor/guzzlehttp/guzzle/src/Utils.php:116

Hi,

There’s likely still a conflict somewhere causing this error. You can try disabling plugins one by one to identify where the issue is.

Best regards