Error 91 means that your health fund is currently experiencing issues, and is not available for Tyro Health Online to connect to, either to process a quote or a claim.

While health fund systems usually operate 24/7, they can be down for either scheduled maintenance, or due to an unforeseen issue.
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If you receive this error, you can still pay for your service or product fully out of pocket via Tyro Health Online, and then submit a claim to your health fund manually (such as via their website or their app).
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Alternatively, if you're attempting to pay for an item or service outside of the operational hours of your health fund, you can always return to continue the payment during operational hours.

If you require further assistance, you can contact the Tyro Health Online support team by clicking the chat bubble located on the bottom right of your browser or by emailing support@tyrohealth.com.