Preconditions:

• Uploaded several image files under Media or child folders.

Steps to reproduce

1. Log in to back office.
2. Go to Content / Media.
3. Start creating an Image content.
4. In richtext field 'Caption' input an image file to trigger image picker.
5. Being on image-picker, expand 'Format and size' in filter section on the right sidebar menu.
6. In file size input type decimal values e.g. range 0.5 - 5.5
7. Click on 'Apply' button.
8. Verify web browser console output and network.

Actual result:

An error 500 occurs 

 "ErrorMessage": {
        "_media-type": "application\/vnd.ibexa.api.ErrorMessage+json",
        "errorCode": 500,
        "errorMessage": "Internal Server Error",
        "errorDescription": "Request POST http:\/\/localhost:8983\/solr\/collection1\/select failed", 

Expected result:

Use can filter image files by size filter using decimal values.

Note:
On Elastic search filtering files by size using decimal values works good.