It is not my intention to insult in any way. Ignorance is normal (you noticed smiley?).

I wanted to say that you have to "mesure" the content well.
You have to delete the unnecessary
- license, speedcams, duplicate files...
You must have
- latest globalcfg
- adequate lang and voice (remove redundant)
...etc
In addition, content errors are possible.
For beginning it is recommended always starts with one map. Then add more files, successively.
You must also delete the previous save folder and leftover "tails", if any.