Aristois does not affect your connection to servers. Check that you can connect with Fabric alone without Aristois and if it affects all/other servers or only one
I am having a problem with the integrated baritone and it is that in the new versions that there are, the minerals are in negative layers and baritone assumes that the world ends at block 0 so it does not go lower than that.
@sprinciasz for example when I select a site with the @click command and write @sel ca or @sell set cobblestone the bot does nothing the same with the .baritone mine diamond_ore command and many others
I believe someone else had the same issue on the same modpack and the solution was to just remove lithium and sodium extra, which are both client-side mods.
Per your last post, you mentioned that you use TLauncher. The donor perks cannot be used on that launcher.
Assuming that you donated under a legitimate account and use the official launcher, you would need to install the donor client and then use .seedmine or .t SeedRay