After running /ri lore add %server:mspt% I get an item with lore "%server:mspt%", a not the mspt number

I was actually about to come and comment the same thing. It seems that this mod only supports the Simplified Text Format from PlaceholderAPI.

I tried naming one of my items using /ri name %world:name% and it also did not work.

Unless this mod is also supposed to support the default placeholders, it may be in the best interest to update the mod descriptions, so people aren't confused.

I was actually about to come and comment the same thing. It seems that this mod only supports the Simplified Text Format from PlaceholderAPI.

I tried naming one of my items using /ri name %world:name% and it also did not work.

Unless this mod is also supposed to support the default placeholders, it may be in the best interest to update the mod descriptions, so people aren't confused.

Hosently, I wasn't even thinking that players would need placeholders for world, server mspt and etc, because this information should be updated once it's changed. But if you need it then I will add support for placeholders soon.