category error 404 pleas help

[dial12]

hello i have a problem in my eshop.

When I create a category, for example Add-ons, and add a product to add-ons, I can't even open the product for clicking on the details right away, it will tell me a 404 error, as well as if I want to open the given category, it will also write 404.

Please help me.

system information (if not all on request by letter)

web: eshop.hoon.sk
Joomla! 3.9.21 Stable [Amani] 25-August-2020 15:00 GMT
VirtueMart 3.8.4 10335
running php runs on: Linux php73-web-12 4.4.0-138-generic # 164-Ubuntu SMP Tue Oct 2 17:16:02 UTC 2018 x86_64
Database type mysql
Database version 5.5.5-10.3.7-MariaDB-1: 10.3.7 + maria ~ xenial-log
Database encoding utf8_general_ci
Encoding the connection to the utf8mb4_general_ci database
PHP version 7.3.16
Apache web server
PHP WebServer interface apache2handler


forgive me for my English but I'm from Slovakia and I didn't find help anywhere in my language

[jenkinhill]

Is this from a quickstart package?  I just looked and with quickstart they have a one year old VirtueMart version with their ownJoomDEv template overrides.
Quickstart problems are very difficult to solve so you may be advised to talk to JoomDev about the problem.

Check the error logs to see if anything shows there.
Turn Joomla & VirtueMart Debug on to see if that helps.