You need to identify why each transaction is in Suspense. Start with the two that appear under accrual basis. Those should be easy.
The fact that so many appear under cash basis suggests a systematic error, by which I mean something you are doing systematically, not some repeated error in Manager. So you should be able to identify the problem by looking at only a few of those purchase invoices.
You have another problem or problems, though. Starting balance equity should always be zero. This is an automatic account Manager activates to force your assets to equal the sum of liabilities plus equity. Anything here represents a problem, most frequently with equity accounts and often with the starting balances.
The two problems could be related. So I would resolve Starting balance equity first. Very likely, you did not set up your capital accounts correctly.