E-bay Pay-Pal broken how can I pay for my items?

[Bobzillagod]

I keep getting this error when I try to pay for stuff

Sorry about that

Looks like this action is not supported. Please return and report this error so that we can support it in the future. (invalid client_id or redirect_uri)

[S8rahb]

Same here. Any clues anyone please?

[MIChaz]

Have encountered the same issue starting on about the 9th of April.  This was while using iPad (iOS 12.2) eBay app (5.30.0) on an iPad Pro.  Same process, however, worked fine via eBay web site and PC.  This may be an mobile device/app issue !?!?!