Dark Side 9 battles will not unlock

Hydrogen

Level 85, have completed all level 8 dark side battles, regular and hard, with 3 stars, but the level 9 nodes will not unlock. Help please!

FlavaFlav10

Same here

FlavaFlav10

Same here. Neither dark side nor the light side level 9 will unlock.

Mc_Iavell

After defeating last 8 hard node, please check if you switched back to normal nodes before actually going to stage 9.

If you pass from 8 to 9 when in Hard Node screen, the system will try to transfer you directly to the 9 hard nodes screen (that is locked untill you finished 9 normal).

Check this