Product page -> error 404 after update CE2.3 to CE2.4

[klartextmedia]

Hi.

I've upgraded an CE2.3 installation to the latest CE2.4, but after that product detail pages have been gone (error 404). I allready have reindexed it.... catageory page is working with all products. Any Ideas?

[theMageComp]

Hello @klartextmedia 

1. Did you try running all the commands, upgrade, deploy, cache and reindex? any error did you find?

2. If any of your product attributes are invalid, this can also cause a 404 error on product detail pages. To check for invalid product attributes, you can run the following command:

php bin/magento catalog:product:validate

3. Check the error log for some idea if the above doesn't work out. 

[klartextmedia]

this command does not exists, it asks for attributes:cleanup instead.

if i do this i get the error

Class Dhl\Shipping\Model\Attribute\Backend\TariffNumber does not exist

i have problems to remove the dhl extensions, but I don't think that this is the problem.

it's also no problem with the redirect, it's also not working on

https://www.baden-fanartikel.de/catalog/product/view/id/1283

it seems like the route to cataloge_view isn't working

[klartextmedia]

Problem solved.... it was the Dhl Extension. No Idea why this affectes product view page, but after removing it manually from the Database it works

[theMageComp]

Glad to hear Enjoy