Thank you for the quick reply and the help! Unfortunately, I tried all of these things and I am still receiving the same error. Here is what the first couple of lines for the csv file look like now. I did try using only lowercase although that did not make a difference so I reverted it to its current state.
num,ID,Other_names,"R.A.","Decl.",RA:h,RA:m,RA:s,Dec:d,Dec:m,Dec:s,"Legacy URL",m_g,M_g,mu_g,R_e,R_e,Redshift,Distance,Nucleated,Class,Environment,Host PGC,host_galaxy,"Spitzer data","HST data",Comments,Legacy_DR10_thumbnails,WISE,GALEX,Hyper_Suprime_Cam