A technical glitch temporarily prevented fans from logging into the Glastonbury festival website on Saturday, which was held without an audience and accessible via a live stream on the internet.
Many fans who paid 23 euros for access to the live stream of the event complained on Twitter that their login codes were invalid.
In turn, the organisers of the Glastonbury Festival have apologised and promised refunds.
The Glastonbury festival is one of the largest music events in Europe and has been held since 1970 near the city of Glastonbury. Tens of thousands of people usually attend every year.