Unable to view transactions on iBank in Safari

It started happening last week, I can log into Barclays iBank and get the front screen (list of the accounts) and flick between personal and business tab. But as soon as I try to look at transactions / make a payment I just get a blank screen come up

I found an old thread and have shut down my iMac, but it is still doing the same thing.

I've uninstalled Chrome just in case before I did the shutdown and restart.

I'm running: macOS Big Sur version 11.4 and it says it is up to date.

Does any one have any ideas?

Sue