Farseek-1.12-2.2.1
Streams-1.12-0.4.1
OpenTerrainGenerator-1.12.2 - v2
Biome_Bundle-1.12.2-v6
forge-1.12.2-14.23.1.2556-installer-win

These are the latest version of all of the above as of now and I removed all other mods.

Without Streams+Farseek the world generates fine. With Streams+Farseek it hangs during generation and I have to crash out of it. I've included the crash report and the log file. Please let me know if you need anything else.

2017-12-01-6.log
crash-2017-12-01_03.01.00-server.txt

Should be fixed in Farseek 1.12-2.2.2; please let me know if this still happens for you.

This is no longer crashing on world gen, but I also can't find any streams in the world. I overflew a LOT of world in creative mode and never found a stream. Is there any way to increase the spawn chance of streams ?

Update: I did eventually find a stream, so it is working, but the chance appears to be vanishingly small.