Barclaycard customers have been unable to make payments this morning as they are unable to log in to the firm's website.
Hundreds of Barclaycard users are reporting problems, according to the website DownDetector.
On social media, users reported being unable to make payments - or pay off card debt.
"I cannot login this morning to pay off my card balance," one customer said.
Another said: "Now it's locked my account. How am I meant to pay my bill?"
Ninety percent of customers reporting issues could not log in to their Barclaycard accounts, though some also had issues with the firm's app.
Most of the problems reported are in London, though there are hotspots in most major cities.
Customers started reporting issues at 8am this morning.
Barclaycard has been approached for comment.
The issue affects a part of Barclaycard called 'online servicing'.
Barclaycard online servicing also ran into problems last week, with users unable to log in then too.
On March 25 Barclaycard announced it had fixed the issue, and apologised to customers.
We’ve fixed the issue with Barclaycard Online Servicing, and you can now use it as normal. To keep up-to-date with the status of all our services, please visit: https://t.co/HxvQcPxXJ5 pic.twitter.com/nhxHhmqosG
— Barclaycard (@Barclaycard) March 25, 2022
However, the issue appears to be ongoing.
Earlier this month football club Chelsea were unable to fill up their team bus at the petrol station after their Barclaycard accounts were temporarily suspended.
But this was a deliberate decision rather than a Barclaycard outage.
The Blues were paying the price for owner Roman Abramovich's links with Russian president Vladimir Putin, who has faced mass condemnation and severe sanctions for invading Ukraine.
Abramovich - a long-time associate of Putin's - was added to the United Kingdom's sanctioned individuals list earlier this month.
This led to the freezing of his assets in a move which has had a huge impact on Chelsea's day-to-day operations.
Earlier this year The Mirror reported Barclaycard was making payments worth up to £300 to customers who were overcharged while on repayment plans.
The payouts are being received by both current and former credit card customers who were with the lender in the “few years” leading up to 2018.
MoneySavingExpert described the payouts as “mysterious” and says details for exactly who is eligible are “scant”.
But the money website explains that they’re the result of a review by Barclaycard - which showed some customers who had fallen behind with repayments had been incorrectly charged default fees and interest.
At the time, Barclaycard told The Mirror that an “operational issue” was to blame for the error.
