DevKinsta has a default limitation on 128MB file upload.
In order to get that increased you will need to access shell.
It can be done by running
docker exec -it devkinsta_fpm bash
This will bring you to the terminal of the application server.
Depending on version of PHP you are using, file is located in
This is for version 7.4. If you need to edit file for different version you can simply change 7.4 in path with PHP version used.
3 values should be changed:
upload_max_size = 128M
post_max_size = 128M
upload_max_filesize = 128M
You can put 256M for all 3, restart DevKinsta, and you are done.