It's hard to say because you didn't attach your code or provide a screenshot of the loops that are failing timing. It looks like you might have placed a non-reentrant subVI inside multiple Single Cycle Timed Loops (SCTLs). Any subVIs inside SCTLs should be reentrant so that each loop has a separate (independent) copy of the IP core. Otherwise, it's impossible to meet timing because you can't access the same resource in multiple places at the same time.
