Same thing happened to me. My history of subs and current subs disappeared and got that same message. After a day of this I logged out of my account and then re-signed in and my subs appeared! But I've noticed their app is extremely glitchy, even their price lists.
Yup, got my results . . . a very disappointing MS62. Even if they graded it a point too conservatively, I obviously missed something with this coin. I've always had a hard time with this series, so I've got some studying to do when I get it back.
I had one graded by PCGS recently. Graded MS61. The cleanest 61 I've ever seen... much nicer than most 63 and 64s I've seen. Ended up selling it for a decent bit over price guide to a guy that agreed it was way nicer than the grade said.
I've sent NGC nearly 200 coins over the past couple of months. The first batch of 100 came back conservatively graded and was very disappointing overall. Second batch should be in before Christmas. We shall see.
I recently saw a PCGS MS-63 that had an area on the reverse that looked like it lost a fight with a screwdriver.