I haven't seen any errors... but I havent seen any thing indicating it's even trying to generate them either... It runs great in RTG, BOP and vanilla but in OTG I find no indication of streams anywhere. The pack is mod heavy but I have no errors and with the same pack but different gens... the streams generate without issue. I'm running biome bundle and I'm inclined to believe that this mod is only set to generate in vanilla biomes and... well ... finding a vanilla biome in a huge map with over 400 biomes... and not just a vanilla biome... but a vanilla biome that actually generated a stream is making it extremely rare.
I could be wrong on that but that's the impression I'm getting here and there is even mention of it in a subredit I read.
Anyone else have issues with this while running biome bundle/OTG?