After trial and error I found this native PS module breaks the BO
ps_apiresources
I had to do this via the database:
load up php my admin
go ps _module
change value of ps_apiresources from 1 to 0
then rename, or delete, the VAR folder in your prestashop root so it recreates the BO
.png.022b5452a8f28f552bc9430097a16da2.png)