If your SN has an ampersand in it, the new knot doesn't like it. No clue why, and no clue when the fix is coming - although it is supposed to be being addressed. Rather than wait, you should create a new SN.
If you are unable to get in and have had no response from the knot's support email, feel free to email me at squirrly103 at gmail dot com and I'll see what I can do.
DIY & Planning
Mom to J: 2011
Mom to H: 2014
Dresses may be easier to take in than let out, but guest lists are not. -- kate51485