Can't access the transaction table

This implies that the opayo_transaction doesn't have an associated commerce_order. I suppose it can happen if the order is manually deleted.

Have you created a fix for this?

Not sure why this has been closed as works as designed? we should show the table even if no results.

I've updated TransactionListBuilder.php to deal with cases where the order can't be found.
Seems to work OK now on my end.

Thats great thanks for the update marking as closed