--it stays on create account instead to forward to create account success-- same problem, but fixed working on setup and around, changing languages and by test it stops at create_account. in my case log told me gdprData.php needed. by the way the languages file come without privacy and other info Pa...

final_price - german, the problem starts with install Addon Ultimative SEO Urls, by using only one language german.
Thanks to Harald (dankjewell) for take me here and thank you very much Christoph for the fix