TMP Importer window causes "EndLayoutGroup: BeginLayoutGroup must be called first." errors

Steps to reproduce:

1. Create and open a new project
2. In Hierarchy, create 'UI (Canvas) -> Text - TextMeshPro'
3. In the opened TMP Importer, click 'Import TMP Essentials'
4. Then click 'Import TMP Examples & Extras'
5. Either Import or cancel in the prompt
6. Observe the Console

Actual results: Two "EndLayoutGroup: BeginLayoutGroup must be called first" errors are thrown

Expected results: Nothing is thrown

Reproducible with versions: 6000.6.0b1, 6000.6.1f1, 6000.7.0a6

Not reproducible with versions: 6000.0.83f1, 6000.3.24f1, 6000.6.0a7

Tested on (OS): Windows 11 Pro (25H2)