@Runemoro Maybe you should somehow make clear that the error should only be reported if it's seen in-game, within the error message.
Especially since this is not the first time that an issue like this has been created. (I can't find the other one any more, though.)

A_mod_doesn_t_support_extended_biome_IDs_--_report_to_JEID (jeid_error_biome).txt

Its actually a .json but i cant upload it

you might want to change the name of the json
it told me to submit a issue

How is this invalid?

The mod creates one file per biome, including the error biome which is displayed in game when the biome is not supported.

You should only submit an issue if you see that text in-game where there should actually be a biome (in the f3 screen, on a map, etc.)