I get error to any modification that I want to make to my realm

A while ago, I added a simple texture pack to my Minecraft PE realm and from that moment anything I want to do, whether it's removing some add-on, texture pack or turning it off, I get an error

 

As it happens when I want to replace the world, I do not abandon myself, I have been trying to solve it, but I do not find a way to do it, I would like to help me solve it, since I need to replace the world.

 

Thank you for your attention

 

Sincerely user "Caliente9000"

 

The error is in Spanish but says "Some of the selected content could not be applied"

 

Wanting to do something else comes out "errorWanting to do something else comes out "error"