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This thread is resolved. Here is a description of the problem and solution.

Problem:
After activating WPML, the cart always shows a quantity of '1' on the client's site, which does not replicate on a test page. Disabling WPML resolves the issue, suggesting a potential compatibility problem with the Fly Cart plugin.
Solution:
We currently do not have a compatibility cooperation with the Fly Cart plugin, which might be causing the issue. To address this, we need to replicate the problem on a clean installation to better understand the compatibility issues. Here are the steps we recommend:
1. Access the clean WordPress installation we set up for you at this link.
2. Install the Fly Cart plugin on this installation.
3. Try to replicate the issue and inform us where to check to see the problem.
This process will help us report the issue to our compatibility team and potentially expedite a resolution.

Please note that this solution might become outdated or may not apply to your specific case. If the issue persists, we highly recommend checking related known issues, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If needed, do not hesitate to open a new support ticket at our support forum.

This is the technical support forum for WPML - the multilingual WordPress plugin.

Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.

This topic contains 2 replies, has 0 voices.

Last updated by Tomasz 1 week ago.

Assisted by: Christopher Amirian.

Author Posts
March 19, 2026 at 9:50 am #17910204

Tomasz

Hi,
Afeter turning on WPML in cart hidden link - it always show 1.

March 19, 2026 at 10:48 am #17910638

Christopher Amirian
WPML Supporter since 07/2020

Languages: English (English )

Timezone: Asia/Yerevan (GMT+04:00)

Hi,

Welcome to WPML support. We do not have compatibility cooperation with the FLY CART plugin, so this might be an issue that needs further investigation. But please consider that it might be the fact that the issue is related to the compatibility, that needs the cooperation of the plugin developers, so we can not guarantee a working solution. But we will do our best.

To be able to report the compatibility issues, we need to replicate the issue on a clean installation.
I created a clean installation of WordPress, WooCommerce, WPML, and all necessary WPML add-ons.
You can access the WordPress dashboard using the link below:
hidden link

Kindly follow the steps below:

- Install the Fly Cart plugin
- Try to replicate the issue.
- Tell us where to check to see the issue

This will help us to report the probable issue to the compatibility team and solve the possible problem faster.

Thanks.

March 19, 2026 at 12:09 pm #17910915

Tomasz

I cannot replicate it on test page. On my site after turning off wpml starts to work normaly.

March 19, 2026 at 12:13 pm #17910959

Tomasz

Find solution in custom script