Hello! I have had my hosting company try to resolve this issue for me and they couldn't help. I've looked through quite a bit of the code trying to find something that dictates this "2MiB" limit. Haven't been successful. My host said the best way to resolve this was to reach out to the developers.
I have my upload_max_filesize set to 10M in my PHP Configuration. I'm able to upload any other file, as long as it's under 2Mib.
You can see the picture attached as reference to what error I get. Is anyone else having this issue? Everything else in x2 works great!