Thank you for taking the time to visit the Community to report this issue, although I apologize that you have not received a response.
The Quicken Subscription version does not support linked accounts nor does it support BoughtX/SellX transactions where the money is used from a different account to complete the transaction.
To resolve this issue, you will need to change the cash portion of these transactions to a Payment/Deposit.
You may also consider adding one large adjustment to the account if you are needing to correct a balance discrepancy.
Moving forward, if you are using money from a linked account you will need to create two transactions, one to transfer the funds (Payment/Deposit) and a second for the Buy/Sell respectively.
If you have not done so already, you may consider reviewing a previous discussionList of Obstacles and Hindrances for Migrating from QM2007 or QWin to Quicken for Mac
I hope this helps!