Very Unprofessional - Digital Project Manager 1Point21 Interactive Employee Review

I was hired on as a digital project manager. After two weeks at the job and just finishing my training, they randomly fired me. My manager brought me into a separate office where it was just him and I and said "I have some bad news, today will be your last day". Surprised, I asked him "What happened?" and he then said "It just wasn't a good cultural fit." He then handed me an envelope and swiftly walked out of the room without even looking me in the eyes. This came to a complete surprise to me because I got along with everyone at the office very well and I never received negative feedback from any of the work I did (which was not a lot). So unprofessional.