When I worked for RCCL I used to issue the LOEs for crew when they were going on vacation and I recall that when I left in March this year they were changing over to printed LOEs only. I didn't try applying for an C1/D with a printed LOE but I remember some countries were more strict than others on what they would accept. RCCL will have told all US Embassys that they have changed to printed LOEs but sounds like the Embassy in your country is being very strict. I'd say you need to get your agent to get an original for you as they will be able to speak to RCCL directly to arrange this. It's in your agent's interests to help you so keep emailing or calling them I think. Good luck!