It all depends from the side you look. I would not compare hestia with wordpress, also wordpress is stable if you know what you’re doing. Hestia isnt a replacement for any sysadmin skills or/and knowledge, it should be an enhancement. That’s why this is here: Please read this, before you start! and aswell @falzo made a proper writeup Ioncube step by step - #3 by falzo
I would suggest, that you provide us as much informations as possible, how your installation is built up, if you have made any modifications, what you already tried for resolving the problem (there is also an option to reset an users password over cli) and so on.