in the wp admin, on the far left side, is the admin menu… posts, pages, plugins, etc… one is forum… I was asking you to navigate to the forum admin from there… not just loading the storage location panel again from the forum accordion menus…
I dont see any way an IP would matter…
if after all that its still occurring, you might go back to your host… and make sure the whitelist rule as broad enough to handle all the admin panels… personally, if it was me, I would tell em to turn off mod security all together – it gets more false positives than true protection in my experiences…