Error 504 gateway timeout

RouterOS Wireless Networking
1

After upgrading to o/s 2.9.25 we get the following error message: error 504 gateway time out, the client can send e-mail, can connect with VPN but is not able to open web pages. All help is welcome

2

What version did you upgrade from?

3

Skybites, more information required about your router configuration as well.

4

I’m not 100% sure because we upgraded several o/s but I think it was 2.9.11

5

Tell me what info you need and we will provide accordingly

6

Skybites,
There should not be described problem, when upgrading from 2.9.x to 2.9.25 (2.9.27 the latest version),
I asked about speicific router configuration, e.g. HotSpot,proxy, etc.