TeamViewer remote control software has been erroneously detected as being used for commercial use. Commercial organizations can purchase the software to offer remote support and for non-commercial, or personal, users to use for free to control their computer or help friends and family with technical issues. The Register has been told that the software is stopping checks for commercial users in regions heavily affected by the Coronavirus. The only way to use it again for personal use is to submit a request to have their ID reset. The US is also included now in the regions where we don’t check commercial use anymore.
Source: https://www.bleepingcomputer.com/news/software/teamviewer-stops-commercial-use-checks-in-coronavirus-affected-regions/