What's strangest, to me anyway, is that I wasn't experiencing this issue a few weeks ago when I last booted up P3P. Nothing relating to P3P as it exists on my computer has changed in that time since. It's still in the same location, and it, to my knowledge, hasn't received any updates. A few mods and Reloaded II have, but. Anyway, rambling aside.
So, when I go to launch P3P, this is the result I've been getting tonight, each time, without fail. As suggested by the error message, I've closed the error and waited a few seconds before trying again, I've double checked for other instances running through my task manager, and I even rebooted my pc. Yes, Persona Essentials is also at the top of my load order, and I've even toggled some mods off and on to see if there's a problem on that front. None of these methods have fixed the issue.
Additionally, there's this other error I get, which I've also attached a screenshot for — something about an arithmetic overflow. From some light perusing both in the console and from some brief googling, this seems more in relation to still having 32-bit P4G. Yes, I haven't updated it, because I want everything I've been using to be updated to the 64-bit version first before I go and make that leap. But, I don't see how that relates to P3P, which, on pc, is only available as a 64-bit executable. Still, figure it's worth mentioning anyway.
Any help on this would be hugely appreciated, please and thanks in advance.