Can't upload videos longer than a minute from PC

Hello,

Right after Instagram got rid of IGTV, I was able to upload a 4 minute video onto Instagram easily from the Instagram website on my PC. However, I'm trying to upload a 3 minute video today and both the Instagram website and Innsist aren't allowing me to do so. I've checked the aspect ratio, reconverted/exported the video 3 times, and have done basically everything but emailing the video to myself so I can download and upload it from my phone (which would be basically impossible since my phone's storage is pretty much gone). Am I doing something wrong or is Instagram not allowing longer videos anymore?