Hi Risto.
I went through several installs, on pc and mac, and did not run into this issue.
Before I continue, please REMOVE ALL COOKIES for the site.
I have seen some bizarre cookie issues mess me up in the past.
Try that first... if that doesn't work, then I'll ask more questions.
So to try and replicate this, can you give me a few more details.
1 - Where did you get the install?
https://www.ortussolutions.com/products/contentboxDid you use Source, War, or Express?
2 - What engine - I know you said you use commandbox lucee 4.5 one time, was it the same on other attempts, if so, with what?
I have been using Source with Commandbox.
3 - Since you have MySql 5.7 (and I have 5.5) maybe try installing with the embedded database H2.
Take MySql out of the equation.
4 - What flavor of linux are you using?