IDK what is in the Rollei kit at all, but I suspect that the material did not totally dissolve. It is a wetting agent like Photo Flo. Photo Flo is proprietary so this must be something else. Some wetting agents will gel up like jelly or slime balls on film if they don't dissolve properly or if they are old or badly formulated.
Since the Kodak and Fuji Final Rinses are so inexpensive, I suggest you try one of them.