Domoticz

i have a rpi 3 with the domoticz software.
I accidentially updated to the latest version with a aeotec z-stick gen 5 which doesn't work anymore.
So i want to restore a selfmade SD backup from version 2023
When the domoticz software starts up for the first time, ik must login with user and password within my webbrowser.
Everytime i get a failed login. (i'm sure i have the correct login and password)
I saw on the domoticz wiki a walkthough to bypass the password, but is doesn't work; is still need to enter a username and password?)
Can somebody tell me what i'm doing wrong?

Did you also check the security setup requirements?

https://www.domoticz.com/wiki/Security

flushing the cache of my browser was the solution.
After that i could use my known login and password and it worked!