I am also receiving this same error message and error code "-9", this began after uninstalling and reinstalling a version of the game that was also glitched out similarly. Previously, I was able to access the skin building function of the base game but not any additional marketplace content that would not be used to create a copy of the "Alex" or "Steve" skins, except for the ones that were saved on my device before this glitch appearing the first time, and now I can't change my skin AT ALL: I'm stuck in a base "Alex" skin.
What is EVEN WEIRDER is that for three days after re-installing the game, it worked perfectly, and during that time I redeemed a 50$ Minecraft gift-card to the account, which has now vanished into the Æther. The attached screenshot of my discord account subtitle message should give you a good idea for how much this series of events have irritated me.
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A uninstall/reinstall fixed this for my Android phone, but it got WORSE a few days later coming up with THIS screen and some of the content that I PAID FOR, and was still able to get access to, in a backhanded way, is now ALSO missing!
When the game loads now I get the following error screen.
[media]Then if I click Past that it goes to the screen in the next post.
After that, I can still access my offline private worlds, but none of the ones which use marketplace content.