You may be required to purchase a visa for your stay in The Netherlands. Find out if you need a visa https://www.netherlandsworldwide.nl/visa-the-netherlands/visa-required
Contact the ISCEV Meeting Secretariat if you need an invitation letter to obtain a visa or travel funds.
E:
It is strongly recommended that participants take out insurance to cover loss (including registration fees) incurred in case of cancellation, medical expenses and damage to or loss of personal effects. The organizers will not be responsible for any medical costs incurred by participants. The Local Host Committee will not accept liability for personal injuries or for loss or damage to property belonging to participants, either during or because of the annual meeting.
https://www.holland.com/global/tourism/discover-the-netherlands/visit-the-cities/utrecht