If you're looking to set up AdGuard properly, here’s how the legitimate service works:
The filtering engine in version 5.4 is nearly a decade old and struggles with contemporary tracking scripts. Safe Alternatives to AdGuard 5.4sn adguard 5.4sn
Lacks many of the heavy modern features like DNS-over-HTTPS (DoH) or advanced Stealth Mode settings found in current versions. If you're looking to set up AdGuard properly,
AdGuard does not officially distribute version 5.4sn anymore. However: adguard 5.4sn
If we look at the core capabilities associated with the 5.4 engine, we can see why this version remains popular among a subset of users.