When you have recently subscribed a new company and uploaded any document, if you get such error, it means Suvit is not able to find the ledgers of your tally.
If you see this error on the Sales/Purchase Transaction Page:
"We do not find the ledger of your company, please sync to load your sales purchase data."
It means your ledger is not synced with Suvit from Tally.
This will help sync the ledger and load your sales/purchase data properly.