To install Minitek FAQ Book:
Before updating your website to Joomla 4, you must first update Minitek FAQ Book to v188.8.131.52 or a later 3.9.x version. Otherwise you will not be able to update the component to v4.
After updating Joomla to v4, you can then update Minitek FAQ Book to the latest v4 stable version. Please note that it's not possible to update from a 4.0.x Alpha version. In this case, you must uninstall the Alpha version before installing the stable version.