Cannot search for my posts

When I search for my posts, I get “Invalid User specified. If you followed a valid link, please notify the administrator”.
I have clicked on the ‘administrator’, but nothing happens and I still cannot look for my posts.

How are you trying to search your posts? When I click your user name there’s a menu with the option to see your posts, is that how you’re looking or are you searching by your user name in the regular search?

I was using the advanced search.
If I put gryfalcon in the top bar search, it finds nothing but askes if I want gyrfalcon. If I click on that, then I get my posts. Thanks.