Files won't upload through web

Hey, everybody. I have a problem with uploading files to the gitlab repository. For some unknown reason gitlab just hangs when I try to upload a file over 200 MB. The modal window for uploading files starts to hang and an error appears at the top of the repository. The limits in the settings have been increased, but it still doesn’t work. Can anyone suggest how to solve this problem?

Error is: Error uploading file. Please try again.
Have no idea how to solve this