Hey there! I checked to see what was causing the issue for you and found this: You have copy pasted a very long list in one note (210.000 characters, which is roughly 40 pages). Because our lists are specially parsed, we cannot currently support this, hence why the crash is happening. If you do not care about data loss, I could delete this note and your notebook will be working again. Otherwise, I can split this mega-note into smaller notes so that everything works again for you. Whichever you prefer is fine! Just keep in mind that large notes like this are better split into multiple notes/ note-sections!