As far as I know, they have an automatized way of compiling and publishing plugins. This system places code plugin projects in a folder like:
D:\BuildFarm\buildmachine_++Portal+Main\GA\4.13\Plugins\LowEntryCompression\Package\Engine\Plugins\Marketplace\LowEntryCompression
This is what causes the filepaths to be too long.
In order to fix this, they would have to make their system use a different folder structure. I’m not certain how hard this is to do, because I don’t know how their system works, but if it takes them this long to fix it, it’s probably not an easy problem to fix.