Name Ranges Disappeared

Name Ranges Disappeared

Is there a data limit in what Zoho Sheets can handle? I have build several tabs within a sheet, some of the tabs having several thousand rows with formulas pulling different pieces of information. After spending nearly a whole day working on a template to use for what we need, I got a "The Server is unable to handle the formula cells in your spreadsheet" error. While the data that I entered obviously didn't populate, ALL of my established data ranges and other pieces of data previously entered completely disappeared. I'm so frustrated right now.