The websites of 14 government agencies have gone down and will be out of action until at least midday on Wednesday.
The Economic Development Ministry has apologised for the outage, which includes the Companies Office and Consumer Affairs.
The ministry says the fault occurred on Saturday evening during preparation work to upgrade servers hosting the websites.
The ministry's main website is still working and contains information on alternative ways to contact the affected agencies.
Many agencies have stated that deadlines that occur during the outage will be extended.