When model into SAVES to do an assessment, the output shows a problem:have no END tag

I manipulated my amino acid sequence into a text box and got an optimal model(http://zhanglab.ccmb.med.umich.edu/I-TASSER/output/S555884/),save as PDB. The evaluation data of this model :C-score=-0.72,TM-score=0.62±0.14,RMSD=6.3±3.9A;Then, I put this model into SAVES v5.0(https://servicesn.mbi.ucla.edu/SAVES/) to do an assessment, the output shows a problem:have no END tag, see the attached file for details. I want to know whether the "no END tag" means that the model is an incomplete protein? Have you ever had a problem like this before?
Looking forward to your reply!