It's likely that this is a temporary ban so you should be back to play soon. You can verify this by connecting to any server on the default MTA client.
If you are unable to check this please create a new appeal containing your MTA serial
It would be worth asking FFS developers if they have a tool or any rules for what content can go on their servers.
There are various ways of changing textures, but not all works for every server.
I recommend posting the full crash message so that other users can better identify the cause of crash.
I have moved your thread into the Spanish support section for best results
Hey @MrKwatro
When you say "Backup" are you refering to your MTA server?
Custom characters / models can be imported into MTA using a select few scripting functions, these are
engineReplaceModel
engineRequestModel
There is also a MTA resource based on engineRequestModel, which does most of the work for you. https://github.com/Fernando-A-Rocha/mta-add-models
p.s. I have moved your thread into the Scripting section
We do not allow the use of the graphics tool with MTA as it's used for cheating, please uninstall or deactivate while playing MTA and you should be good to go.
The ban expires June 21