Hello コアシステム 株式会社,
Thanks for your question
So this is a AppSessionSelectionInvalidSessionNotExist error which means Application requested a user session that doesn't exist. i.e it is logging in to an account that does not exist. To resolve
- Try logging into a private/incognito tab or a different browser. Preferrably edge Inprivate
- Also try Clearing browser cache and cookies
See similar issues here:
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola