Hello, yesterday i had upgrade my website x5 to 2020 version. Becouse there is to many errors, can you tell  me how can i go back to previous version. 2019.3.17. I created backup project file and becouse i have a web class on my website, i have to go back. BTW locked page and database user doesnt work ether. So my student can not connect to my web clasess anymore. My php version is 7.3...

Thanks for helping us.