CSV column heading error

Hello, I am facing a problem when I tried to preview the form and the following error is appearing: “CSV column heading “” cannot be turned into a valid XML element” All my headers do not contain space, please can you help me in this? I have attached the two files.
endline_test.xlsx (49.4 KB)
pulldataage.csv (3.6 KB)

@myriamdagher1, I tested your sample files, and they worked smoothly for me. FYR: