Ok solution so far is to join a King of the Hill server, spawn in, log out and then join the RPUK server.
That might work for you as it worked for a couple other people but it didn't work for me.
Check your memory usage, when my A3 crashes with memory, it was because of too much memory was being used, after shutting some programs down, it worked fine. Thanks to @Azamai
I have a sixth sense, I know everything!
I know how you felt when killing those innocent officers
I know how you felt when you were betrayed by your own men
I know how you felt when you rejoined the Police to uphold justice
I know how you felt when you choose Athira over Agios [You felt like...
If the members of the UNMC actually bothered protected him while he transported the golds and not focused on shooting the cops, this will not happened. ;)
#SGTRenegade
Edit: Forgot to add, JOIN AGIOS YOU HAVE A BETTER FUTURE
Oh yes it is, the problem was too much program was running and memory was being used too much, after closing and uninstalling a couple programs, the problem was solved.
Thanks @Azamaiglad you were there!
Recently for some reason I have been receiving either memory could not be read or written.
I can join and play on any servers fine but when I join RPUK servers it just says that.
Specs
GTX 970M
i7-5700HQ @ 2.70hertz
16 RAM
64 bit, Windows 8.1