Sometimes forum's search results show:

"Database error
The IrfanView Support Forum database has encountered a problem.
Please try the following:

Load the page again by clicking the Refresh button in your web browser.
Open the home page, then try to open another page.
Click the Back button to try another link.

The forum technical staff have been notified of the error, though you may contact them if the problem persists.

We apologise for any inconvenience."

It seems to happen if I am not logged in. Thank you for reading and hopefully fixing and answering soon.