oxygene opened the ticket and wrote:

You can't fund industries within 14 tiles distance from ANY other industry. As I understand the source, it is intended that this is only forbidden for certain conflicting industry types but not in general.

Please check CheckIfTooCloseToIndustry() inside industry_cmd.cpp. The first if-statement inside the loop checks for
indspec->accepts_cargo[0] == indspec->accepts_cargo[0]
which doesn't make sense. Instead, it should check agains the accepted cargo of the industryspec of i->type.
I don't know, maybe checking other indices than 0 would be necessary too(?)

Reported version: 0.5.2
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/860