[JaTochNietDan]

A tag mismatch warning means that you're not using the correct values in the arguments of the function. I don't know of a RemoveObjectForPlayer (Unless it's a custom function from your map editor or something), but there is a function called RemoveBuildingForPlayer in the SA-MP API:

https://sampwiki.blast.hk/wiki/RemoveBuildingForPlayer

Check out the documentation on it and make sure that the arguments you are providing it are valid, if you're not sure, post the code here and we can help out.