Clicking “Import TMP Essentials” again after exiting Play Mode throws “ArgumentNullException” in the Console window

Steps to reproduce:
1. Create new Unity project
2. In Hierarchy create Button - TextMeshPro GO
3. Enter Play mode
4. In TMP Importer window press “Import TMP Essentials” button
5. Exit Play mode
6. Press “Import TMP Essentials” button again
7. Observe the Console window

Actual results: “ArgumentNullException: Path cannot be null.” Error is thrown in the Console
Expected results: no errors are thrown in the Console window

Reproducible with versions: 6000.0.72f1, 6000.3.13f1, 6000.4.2f1, 6000.5.0b3, 6000.6.0a2

Tested on (OS): Ubuntu 24.04, macOS Silicon Tahoe 26.3.1 (a) (M1)

Notes:

ArgumentNullException: Path cannot be null.
Parameter name: path
System.IO.File.WriteAllBytes (System.String path, System.Byte[] bytes) (at <346da8cd57274f9fb70f7bb52cee8325>:0)
TMPro.TMP_PackageResourceImporter.ImportCallback (System.String packageName) (at ./Library/PackageCache/com.unity.ugui@47e51ce530b9/Runtime/TMP/TMP_PackageResourceImporter.cs:139)
UnityEditor.AssetDatabase.Internal_CallImportPackageCompleted (System.String packageName) (at /Users/bokken/build/output/unity/unity/Editor/Mono/AssetDatabase/AssetDatabase.cs:64)