8.1.3: compatibility issues

Resolved nickk40
(@nickk40)

4 months, 1 week ago

After updating to version 8.1.3 I received the email below. There seem to be some compatibility issues with other plugins.

WordPress has a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with one of your plugins, Mollie Payments for WooCommerce.

First, visit your website (https://***.com/) and check for any visible issues. Next, visit the page where the error was caught (https://***.com/wp-admin/update.php?action=update-selected&plugins=eu-vat-for-woocommerce%2Feu-vat-for-woocommerce.php%2Csfwd-lms%2Fsfwd_lms.php%2Cmollie-payments-for-woocommerce%2Fmollie-payments-for-woocommerce.php%2Cwoocommerce-pdf-invoices-packing-slips%2Fwoocommerce-pdf-invoices-packingslips.php&_wpnonce=2e37) and check for any visible issues.

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

Plugin Support Femi
(@femiyb)

4 months, 1 week ago

Hello @nickk40

Thank you for reporting this.

To properly diagnose what’s causing the fatal error after updating to version 8.1.3, we’ll need to review the relevant error logs and rule out a possible plugin conflict. The recovery email itself does not contain enough technical detail to identify the root cause.

Please check the error logs by enabling WordPress debug logging (if it isn’t already enabled), then reproduce the issue or re-run the plugin update. After that, review the file at wp-content/debug.log and share the specific error message shown there.

To test for a possible plugin conflict, temporarily deactivate the other plugins that were updated at the same time, keeping WooCommerce and Mollie Payments for WooCommerce active. If the error no longer occurs, reactivate the other plugins one by one to identify which plugin is conflicting.

If the issue persists even with other plugins disabled, please roll back Mollie to version 8.1.2 as a temporary workaround.

Once you’ve shared the logs and results of these checks, we can determine whether this is a compatibility issue or a bug introduced during the update and advise on the safest next steps.

Thank you.

Regards,
Femi
Plugin Support Femi
(@femiyb)

4 months, 1 week ago
Hi @nickk40

If you encountered an error after updating from version 8.1.2 to 8.1.3, this appears to have been caused by a temporary timing issue during the update process itself. In some cases, requests (such as admin or REST requests) can be triggered while the plugin files are still being replaced on the server, which can briefly lead to a mismatch between old and new files.

Note that is a one-time issue that can only occur during the update process. Once the update has completed successfully, the plugin works as expected and the error should not occur again.

Optional verification

If you would like to confirm that the update completed correctly, you can do the following:
- Go to WordPress → Plugins → Plugin File Editor
- Open the file src/Payment/inc/services.php
- Around line 125, confirm that the RestApi class is instantiated with three arguments, unlike the note in the error logs.
If you notice the error again or have any concerns about checkout or payments, please contact us and include your latest WooCommerce/Mollie logs so we can take a closer look.

Thank you.

Regards,
Femi
Thread Starter nickk40
(@nickk40)

4 months, 1 week ago

Thanks @femiyb , it seems indeed to have been a one-time error. I can confirm I see three arguments on line 125.

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

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