Hello all,
I need your help 
Does anyone has experience by using Spring and OAuth2?
I was able to open the authentification screen of Azure. But after redirect to my vaadin application I will get the following error:
Access to XMLHttpRequest at ‘https://lunchlisttest.b2clogin.com/lunchlisttest.onmicrosoft.com/B2C_1_Anmeldung/oauth2/v2.0/authorize?response_type=code&client_id=98e11d3c-1270-4c7f-b26d-36e6f3fed5e5&scope=openid%20profile&state=JoB07bnycZpDgG9oCsV9hthmfSDsmO0b76n2B09bXjM%3D&redirect_uri=https://localhost:8080/home&nonce=d6WufTVO5MoYjW_DmJcyDr50jFPcyDIxWMn-fe-JCXA’ (redirected from ‘https://localhost:8080/home?state=faKINRGmCik1BjHjH-eh889DGfYe0qpy_OPsAieIodc%3D&code=eyJraWQiOiJjcGltY29yZV8wOTI1MjAxNSIsInZlciI6IjEuMCIsInppcCI6IkRlZmxhdGUiLCJzZXIiOiIxLjAifQ..irapBhxw3RX9j4as.eMNkABpZ8RVq6rNqRj6fh2HObg4H358fnx_8UJbbFgwZmHzmEkAuKQ6J2ar3z0x9ZpHj5xOwNEUdmyeJDpozjwLALTcG5RnMPRy6vE3s2ezf-hCqU10pF_c-7dOrQqicqzRRvCHQ_3HdekOz467cd3C1iAjNDij31kua53cHuqLTvI4aYpV6_q-aGSQ37_JwIHctsz1UVitLKjM9DSDZyfdxaLCZeOYgryJiTCbQaxDrNnU0K3PEDAMM8yw44wjACgidi9ZBr5C49nN7NbE2Zn8qxan6rDKSgxlETXpoYRhGDA8xCPwj52TiWbO25nqtn572hBgMxvkOITGOGq7FzqwEhAG2WpIGcXnevzb6VzEa8KbUC0-NOWeApKIrlSOjjS_Uxh2Jxfuq0nPfqH44XTS1XAv52XPVzQ43I2_OqT-IZ3aqMYR1ZJDXaIHUDG2U7s_49Sn1mP4cup9YUmP48FJkG0WqS9g0R5q5a0TWS1gnBEzWj7qJCgo-hA2ynAVeqvVyEsPVUjFbL3urhSaRXKe006k3VbH9BkvFB9clAeud-laSH_Azc0-09EL6bW4LzuMoVun7N5I2zMF--GMZ0RuIQ2qRv0EuexgM3yfUtMHAQ2A.DI_d03Q4wJqORhwX_MSewQ&v-1593982275736’) from origin ‘https://localhost:8080’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.
Thanks for your help!
Best Regards,
Thomas