Group avatar - file format not supported issue

[trafford-tbe]

Description of the problem, including code/CLI snippet

I'm trying to add avatar to group using following command:

gitlab -v group create --name "Test 1" --path "test1" --parent-id 21 --avatar "/tmp/logo_lab.png"

where:

1. Group creation without --avatar option works correctly.
2. Path to .png is absulute path to file with correct read permissions.
3. The same file added using web-gui dispalys correctly.

Expected Behavior

Avatar added to group.

Actual Behavior

Message returned:
Impossible to create object (400: Failed to save group {:avatar=>["file format is not supported. Please try one of the following supported formats: image/png, image/jpeg, image/gif, image/bmp, image/tiff, image/vnd.microsoft.icon"]})

Specifications

• python-gitlab version: 4.2.0
• API version you are using (v3/v4): v4
• Gitlab server version (or gitlab.com): v16.6.2-ee