Internal Server Error after update to latest version

[BeaverUI]

After updating Mollie in OC3 to the latest version, whenever a customer tries to complete the payment there is an Internal Server Error. In the logfiles I get the following: "2025-08-06 13:22:33 - Error setting up transaction with Mollie: Zorg ervoor dat u een veilige verbinding gebruikt.."

Downgrading back to 13.4.0 made things work normally again.

[MabadosS]

Same here. Did the update on 3 opencart shops. All fail when customers try to pay. Now downgrading back to 13.4.0 . Please developers check your mod before pushing an update. Thank you.

[QualityWorks]

We have not been able to reproduce this issue. can you please share your logfiles with us on support.mollie@qualityworks.eu ?

[MabadosS]

This is the error we are getting on 3 different Opencart installations:

Opencart version 3.0.3.9

Warning: mysqli::query(): (42S22/1054): Unknown column 'callback' in 'INSERT INTO' in /home/*********/public_html/system/library/db/mysqli.php on line 25

If needed, I made a screen recording on one of my shops with the failing payment and can send it to you.

Like I mentioned, the same error occurs on 3 opencart shops who are all on a different server. Returning back to the previous version of the molly mod makes it work again.

[QualityWorks]

the message regarding unknown column is fixed in 13.4.2
the other message we cannot reproduce, can you check if 13.4.2 fixed that one too?

[MabadosS]

Hi, we only had the 'unknown columm' error. We did not have the error @BeaverUI mentioned.

I can confirm that the 13.4.2 update now works on all of my opencart installations.

Thank you.