Checkout not working after upgrade from 2.2.9 to 2.4.2-p1 about dhl-shipping-m2

[mam08ixo]

Did you also watch out for 500 errors in the network tab when entering cart or checkout?

[OvalMedia]

Yes, I checked everything. All files came fine with status code 200.

[mam08ixo]

okay, how about nginx/apache/php log (you did not mention that explicitly)?

[OvalMedia]

Also nothing :(

[mam08ixo]

If you had the old DHL Shipping module installed and did not do so already, follow the uninstallation guide.

To reset the new module settings, clearing all carriers/dhl% entries from core_config_data should be enough. But I doubt that a misconfiguration can lead to the reported behaviour.

[OvalMedia]

You are right, that did not make a difference. But meanwhile I found out there seems to be in incompatibility with the module Aheadworks Reward Points. I just disabled that (with DHL shipping enabled) and cart/checkout are both working again.
Will keep you updated in case I find out more.

[ngolatka]

No further activity -> issue closed.