There is no requirement to have a business PayPal account in order to sell tickets on Twickets.
If PayPal is asking you to verify your business after selling through Twickets, you may have mistakenly selected to connect a Business PayPal account when setting up your listing. Please get in touch with PayPal directly to confirm you are not a business and ensure they have you set as a personal account.
After this, you may need to re-connect your PayPal account to your Twickets account next time you list a ticket.