What happens to sources

For about a week now, I've noticed problems accessing sources, both those already indexed and those not. It says "this record has been removed."

Similarly, when the "research aid" suggests a source, it's impossible to attach it for the same reason: "this record has been removed."

I request that you review this issue, as otherwise, the published data would not be supported by the corresponding records and, therefore, would be unreliable.

Thank you very much for your attention. Best regards