[2.1]: Uploading avatars fails when neither Fileinfo nor Exif extensions are installed

[Sesquipedalian]

Basic Information

When neither the Fileinfo extension nor the Exif extension is installed, all images that a member tries to upload as an avatar will be rejected with the message "The avatar you have selected is not a valid image file."

Steps to reproduce

1. Disable both the Fileinfo extension and the Exif extension in your PHP configuration.
2. Attempt to upload a valid avatar image.

Expected result

The avatar image is accepted.

Actual result

"The following errors occurred when trying to save your profile:
The avatar you have selected is not a valid image"

Version/Git revision

2.1.6

Database Engine

All

Database Version

No response

PHP Version

No response

Logs

Additional Information

Reported here