401 Unauthorized Error in Simulation Portal

Dear Team,

We are currently encountering a 401 Unauthorized error in the Simulation Portal, which started this morning. Prior to this, the portal was working fine without any issues.

Kindly investigate and advise on the resolution at your earliest convenience.

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Dear all,

We have also encountered the same error , although it was working properly a few days ago. We have also verified the expiration date of the electronic certificates, and they are still valid.

Thank you in advance.

I have same error did u fix it?
my https://gw-fatoora.zatca.gov.sa/e-invoicing/simulation/compliance/invoices
work fine but when report single i got this error!!!