you added extra spaces between the variables. Delete them.
The trim function should contain both the first and last name variables at the same time. Currently you have set it up to only trim the first name.
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Did you know, the concepts of about 70% of questions asked on this forum are already covered in the Make Academy. Investing some effort into it will save you lots of time and frustration using Make later!