Hi Ralph,
I am sorry but this issue is not reproducible on my end.
I was able to submit to FUMA with a file with 20 lines.
I can't attach a file to this message but this is the content of the file:
cat CD_sig_small.gwas
rsID chr pos ref alt p
rs2071987 1 7834026 G A 2.8e-10
rs2797685 1 7879063 C T 2.7e-10
rs697693 1 7886424 G A 8.9e-10
rs2640908 1 7889941 C T 2.8e-10
rs707472 1 7906008 G T 4.5e-10
rs6656890 1 67458463 G A 2.2e-15
rs12061545 1 67526029 A G 1.8e-08
rs12097741 1 67528006 A C 3e-08
rs4655679 1 67599657 C T 1.5e-24
rs10789224 1 67605134 T C 1.2e-25
rs7539795 1 67609446 A G 3.2e-08
rs4655683 1 67611613 G A 3.3e-21
rs6588245 1 67611799 C T 2.5e-08
rs10889657 1 67615487 T C 1.3e-26
rs11209005 1 67618678 A G 1.5e-26
rs12041056 1 67627260 C T 2.7e-08
rs6682925 1 67631262 C T 1.8e-08
rs6683039 1 67631333 C T 3.6e-09
rs1884444 1 67633812 G T 3.8e-08
Best,
Tanya