Show 500 error when user uploads a file size larger than limited file size in backend

[hiepvq]

• solution Show a message to user such as "File size is bigger than limited file size, please try again with smaller file size"

[hiepvq]

this is small bug i was fixed at localhost, how i can push code to this repository

[hiepvq]

@imorland please fix this bug with my small fixed.

Moving $upload variable following attachment image to fix this bug

[github-actions[bot]]

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