Hello, I'm dealing with a hard to catch error: some of my users report that when entering one of the sites of the network, they end up with the "Unknown login key" message that I can't reproduce with my own user and password.
Is there a way to check/debug what's happening?
I have around 40,000 rows in the domain_mapping_logins table, but what I've seen is that you delete unused logins after 120 seconds. Is this proof that not all operations end up in the database?
What tricks can you show me/send me?
Thanks in advance.