I have two iPads and two iPhones, and two of the oldest ones of the iPads and one of the iPhones have not had this problem because I think they didn't get this update. The other two, however, are trying to load skins we have created and fail, crashing the game in the process. I could just delete the app and reinstall it but I'm afraid I'll have to pay for it again. How can this be fixed?
Minecraft – New MCPE update causes app to crash when loading skin
minecraft-bedrock-edition
Related Solutions
There is a lot of possible things that will occur, also in PC:
Check your Internet connection. Maybe giving your internet a google search or a speed test.
Test for another server. The server may be having too much traffic, so that it can't send you any data, causing a blank world to show up. (Lifeboat is a popular server) EDIT: Maybe you can test on low-players servers.
Check if the server's versions is it same as yours.
Try reinstalling MCPE. You can also make a world backup in iOS: www.youtube.com/watch?v=FxUgOoO1xOE.
Try downgrading/updating your MCPE. I don't really know how to in ios, but you can google search it. Maybe jailbreaking it?
Try the server at another device. You can get another one like Android and test if it works on that phone.
Maybe leave it over than 10 min, if it still doesn't work, 30 min.
Test the server at another WiFi hotspot. Maybe going to Starbucks and test if it works or going to your friend's house?
You need to press the "coat hanger" icon on main menu. Here is image about the button: 
Best Answer
no, you won't have to pay agin. If you have worlds you want to keep you can copy your worlds folder to your computer and put it back after reinstalling