It's been a long time, and maybe you've found a solution, but I happened to be reading the help for the LDS.org Notes area, and noticed this in the FAQs:
Q: I can't access Notes and Journal. I keep getting an error.
A: If you can't access Notes and Journal, try clearing your cookies and browsing history (or try another browser entirely) and attempt to sign in again.
If nothing else, that may be of use to someone else...
(That help looked quite good to me, BTW:
https://ue.ldschurch.org/ldsapphelp/notesandjournal/)