Yes, travel insurance is mandatory when applying for a Slovenia visit visa. The insurance must cover at least €30,000 and should be valid for the entire duration of your stay in the Schengen Area. It should also cover medical emergencies, hospital treatment, and repatriation if needed. This requirement ensures that you are financially protected in case of any health issues during your trip. Without valid travel insurance, your visa application may be rejected, so it is an important part of the process.