RuntimeError in PBS/pokemon.txt?

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Pokemon Essentials
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Exception: RuntimeError

Message: Field [placeholder] is not a positive integer

File PBS/pokemon.txt, section 0, key Evolutions



Compiler:411:in `csvPosInt!'

Compiler:1881:in `pbCompilePokemonData'

Compiler:1875:in `each'

Compiler:1875:in `pbCompilePokemonData'

Compiler:1872:in `each'

Compiler:1872:in `pbCompilePokemonData'

Compiler:4098:in `pbCompileAllData'

Compiler:4212


I'm... pretty new at this stuff so I don't really know what this means or why it's happening, can someone explain this to me and tell me how to fix it? It happened when I tried to add a new pokemon species into the file

You typed somewhere "[placeholder]" and the game doesn't know how to deal with it. Just replace it with a vilid entry.