Sorry, nah no need for screenshot, I believe you, I need some other info:
1. What browser do you use + Version of it, any extra add-ons?
2. Operating System version?
3. How does this issue occur (first screen disappear)?
4. About prestige, I would need your text save, just paste it to pastebin.com and send me it. Also do you mean prestige button (crown) is missing? If it is missing, is something else missing with it? If you can't click "prestige" button and it shows "Locked" or "???", it means you need all upgrades from main shop (they need to show "MAX" or "Locked" or "???"), then prestige button will show price.
Also, it's 22:18 for me, but tomorrow next update will arrive with bug fixes (compiling it right now).
Some sort of achievement for adventure would be nice, for exemple "kill 300 monsters", reward 10% more power or "die 10 times", reward: 5% more max health/regen.
 "Fisherman - Idle Fishing Clicker"){kind=icon}
 "Wizard (And Minion) Idle - Beta version"){kind=icon}
 "Dinogen Arena"){kind=icon}
 "Idle Up"){kind=icon}
 "Aspiring artist"){kind=icon}
 "NGU IDLE"){kind=icon}
 "Religious Idle"){kind=icon}
 "Click It!"){kind=icon}
 "Idle Train 2"){kind=icon}
Try loading from text or pushing F8?