Fixed in 25w19a.
@Andres Merida I don’t think PojavLauncher is officially supported by Mojang.
You could be getting this issue due to having a faulty internet connection or a server side issue, confirm that the minecraft server is online and connectable.
so im not the only one having problem with that...
Can confirm. The issue here is that the Java version shipped with the launcher for 1.8.9 is outdated and cannot handle the new certificates. You can fix it by changing it to use the latest build of Java 8 from e.g. Adoptium.