Factual error: The opening scene shows Cassie and Bryan booking their holiday on a laptop. The dates that they book the holiday home are between May 5th 2018 and May 12th 2018, which means the movie is set in 2018. But later in the movie, when Cassie finds the video of Bryan with the two women on his phone, the date is listed as "Sunday, May 7", and May 7th 2018 was a Monday, not a Sunday. (00:01:05 - 01:10:55)
Factual error: When Cassie finds Bryan's phone, Federico sends a text containing a video of Bryan cheating on Cassie. The time displayed on the phone is 6:35PM and the date displayed is May 7, however the scene currently takes place at night and every time an exterior shot of the house is shown during this time, the sky is dark. 6:35PM in May is way too early of a time in the evening for it to already be the middle of night. At that time of year, the sun would not set until much later in the evening. (01:10:55)