Steps to reproduce:

1) Open Unity Hub and create a new project
2) Switch Platform to Android in the Build Settings
3) Go to Player Settings> Publish Settings
4) Click on Keystore Manager button and create a new Keystore
5) Fill all the details in the Keystore Manager window and click on Add Key button
Note: Confirmation window will pop
6) Select Yes button to set them as your Project Keystore and Project Key
Note: Project key is still set as Debug(it should automatically assign your recently created key)
7) Try to change the key by clicking on Alias dropdown menu
Note: Error will appear:
Unable to create key in keystore. Please make sure the location and password of the keystore is correct. E:\Program Files\2019.1\2019.1.0a12_5175bce2e5d4\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\OpenJDK\Windows\bin\keytool.exe -list -keystore "C:/Users/Ernestas/Downloads/BugKeystore\C:/Users/Ernestas/Downloads/BugKeystore/KeystoreRepro.keystore"

Expected result: Project Keystore and Project Key should be automatically assigned and no error (check attached video "KeystoreExpected.mp4")
Actual result: Project Key is not assigned. Error appears in the Console (Check attached video "KeystoreBug.mp4")

Reproduced with
2019.1.0a12, 2019.1.0a14, 2019.2.0a1

Not reproduced with:
2018.3.3f1, 2019.1.0a11

Regression since:
2019.1.0a12

Note: This bug triggers every time if Keystore is created in the project's location
Note: Bug appears only 1st time when clicking on Alias dropdown button if Keystore is not created in the project's folder