Text Filter require scalar value error

Hi, please see here: I had a fgunction that WAS working, I added a step, now it gives me a scalar value error... I deleted that step, it still give me the error... 

https://www.loom.com/share/6542158240524940af069fb53265fe90?sid=a21d2bd4-cb2c-4c7a-b04b-4aeea3080b1e