It is worth taking into consideration that there were 2/3 good quality cam versions of TROS that leaked online within the first few days of the film release. It is also on many dodgy streaming websites, and available on nearly all IPTV and firestick type services (which are apparently becoming more popular & accessible - and easier to use - with each passing year).
Whilst many may want to watch the final installment of the main saga on the big screen for their first viewing of the film… having such options to watch the film from the comfort of your armchair for second or third viewings etc may well have affected cinema takings.
The average film fan may opted also to watch the film online given the quality of cams available - and families struggling for money - especially around this time of year… may have opted for that option rather than spend $40-60 etc at the cinema on tickets alone; with the release of the film on dvd, blu ray and 4k UHD come March…
That’s not just an issue for TROS - it is the same for many films released in cinemas this time of year that have decent quality leaks quickly appearing online.