After installing AShop, the administration panel login does not work or you are able to login, but configuration settings won't save and the program kicks you out to the login screen when saving store configuration changes.
Incorrect ashoppath or ashopurl settings can cause this trouble.
Versions prior to 3.6.3 - Check the ashoppath and ashopurl settings within the config.inc.php file.
Versions after 3.6.3 - Check the ashoppath and ashopurl settings within the database table 'preferences'.