First I prepared the repo as described in the contributing guide by cloning it, restoring and building it.
When running yarn start the app starts on localhost. I sign in using a Microsoft account (no work or school account) and eventually I am presented with HTTP 431 (Request Header Fields Too Large).
There is a header Cookie which is 8563 characters long and appears to be an aggregation of several JWTs. It goes like this:
msal.a974dfa0-9f57-49b9-95db-90f04ce2111a.client.info=eyJ1aWQiOiIwMDAwMDAwMC0wMDAw...; msal.a974dfa0-9f57-49b9-95db-90f04ce2111a.login.request|c8591ba7-8643-4dd0-a86c-38240fd5c6e9=http://localhost:3000/; msal.a974dfa0-9f57-49b9-95db-90f04ce2111a.authority|c8591ba7-8643-4dd0-a86c-38240fd5c6e9=https://login.microsoftonline.com/common/; msal.a974dfa0-9f57-49b9-95db-90f04ce2111a.nonce.idtoken|c8591ba7-8643-4dd0-a86c-38240fd5c6e9=950c6017-41e9-4244-a874-02e7d8d40f47; msal.a974dfa0-9f57-49b9-95db-90f04ce2111a.state.acquireToken|c8591ba7-8643-4dd0-a86c-38240fd5c6e9=eyJpZCI6ImM4NTkx...;msal.a974dfa0-9f57-49b9-95db-90f04ce2111a.login.request|965aad0f-7740-44db-8be3-8a21d26c4f2d=http://localhost:3000/; msal.a974dfa0-9f57-49b9-95db-90f04ce2111a.authority|965aad0f-7740-44db-8be3-8a21d26c4f2d=https://login.microsoftonline.com/common/; msal.a974dfa0-9f57-49b9-95db-90f04ce2111a.nonce.idtoken|965aad0f-7740-44db-8be3-8a21d26c4f2d=5b3e211d-6756-4892-b50d-17cdebbd18b3; msal.a974dfa0-9f57-49b9-95db-90f04ce2111a.state.acquireToken|965aad0f-7740-44db-8be3-8a21d26c4f2d=eyJpZCI6Ijk2NWFhZDBm
This goes on for quite some time and somewhere in between there is this:
msal.a974dfa0-9f57-49b9-95db-90f04ce2111a.error.description=Silent authentication was denied. The user must first sign in and if needed grant the client application access to the scope 'user.read people.read user.readbasic.all contacts.read calendars.read presence.read.all tasks.readwrite presence.read user.read.all group.read.all tasks.read openid profile'.;
Of course I have accepted all those permission requests, even revoked them once and regranted to start over clean.
What am I not getting?
I use Win 10, node 12.19.0 and VS Code 1.51.1. and access the provided app (Amazing Microsoft Graph Toolkit App - client ID a974dfa0-9f57-49b9-95db-90f04ce2111a) which is the default in the index.html file.
Thanks for any hints.