Та же ситуация. Если поможет, то вот трейс редиректов URL при попытке интеграции с порталом Госуслуг с вашей страницы
Status Code URL IP Page Type Redirect Type Redirect URL302 https://esia.gosuslugi.ru/aas/oauth2/saml/SAMLAssertionConsumer 109.207.2.205 server_redirect temporary https://esia.gosuslugi.ru/aas/oauth2/ac?client_id=TELE2&client_secret=MIAGC.......=&redirect_uri=https://tele2.ru/redirect-processing?resource-type=esia&scope=openid+fullname+birthdate+gender+id_doc&response_type=code&state=02764f8e-9d80-420c-b714-2e40e647ae00&access_type=offline×tamp=2020.10.12+17%3A46%3A59+%2B0300302 https://esia.gosuslugi.ru/aas/oauth2/ac?client_id=TELE2&client_secret=MIAGC.....=&redirect_uri=https://tele2.ru/redirect-processing?resource-type=esia&scope=openid+fullname+birthdate+gender+id_doc&response_type=code&state=02764f8e-9d80-420c-b714-2e40e647ae00&access_type=offline×tamp=2020.10.12+17%3A46%3A59+%2B0300 109.207.2.205 server_redirect temporary https://tele2.ru/redirect-processing?resource-type=esia&error_description=ESIA-007005%3A+The+client+is+not+authorized+to+request+an+access+token+using+this+method.&state=02764f8e-9d80-420c-b714-2e40e647ae00&error=unauthorized_client307 https://tele2.ru/redirect-processing?resource-type=esia&error_description=ESIA-007005%3A+The+client+is+not+authorized+to+request+an+access+token+using+this+method.&state=02764f8e-9d80-420c-b714-2e40e647ae00&error=unauthorized_client 178.248.237.55 server_redirect temporary https://spb.tele2.ru/redirect-processing?error=unauthorized_client&error_description=ESIA-007005%3A+The+client+is+not+authorized+to+request+an+access+token+using+this+method.&resource-type=esia&state=02764f8e-9d80-420c-b714-2e40e647ae00200 https://spb.tele2.ru/redirect-processing?error=unauthorized_client&error_description=ESIA-007005%3A+The+client+is+not+authorized+to+request+an+access+token+using+this+method.&resource-type=esia&state=02764f8e-9d80-420c-b714-2e40e647ae00 178.248.237.55 client_redirect javascript https://tele2.ru/lk/profile?pageParams=esiaStatus%3DcheckError
Та же ситуация. Если поможет, то вот трейс редиректов URL при попытке интеграции с порталом Госуслуг с вашей страницы
Status Code URL IP Page Type Redirect Type Redirect URL
302 https://esia.gosuslugi.ru/aas/oauth2/saml/SAMLAssertionConsumer 109.207.2.205 server_redirect temporary https://esia.gosuslugi.ru/aas/oauth2/ac?client_id=TELE2&client_secret=MIAGC.......=&redirect_uri=https://tele2.ru/redirect-processing?resource-type=esia&scope=openid+fullname+birthdate+gender+id_doc&response_type=code&state=02764f8e-9d80-420c-b714-2e40e647ae00&access_type=offline×tamp=2020.10.12+17%3A46%3A59+%2B0300
302 https://esia.gosuslugi.ru/aas/oauth2/ac?client_id=TELE2&client_secret=MIAGC.....=&redirect_uri=https://tele2.ru/redirect-processing?resource-type=esia&scope=openid+fullname+birthdate+gender+id_doc&response_type=code&state=02764f8e-9d80-420c-b714-2e40e647ae00&access_type=offline×tamp=2020.10.12+17%3A46%3A59+%2B0300 109.207.2.205 server_redirect temporary https://tele2.ru/redirect-processing?resource-type=esia&error_description=ESIA-007005%3A+The+client+is+not+authorized+to+request+an+access+token+using+this+method.&state=02764f8e-9d80-420c-b714-2e40e647ae00&error=unauthorized_client
307 https://tele2.ru/redirect-processing?resource-type=esia&error_description=ESIA-007005%3A+The+client+is+not+authorized+to+request+an+access+token+using+this+method.&state=02764f8e-9d80-420c-b714-2e40e647ae00&error=unauthorized_client 178.248.237.55 server_redirect temporary https://spb.tele2.ru/redirect-processing?error=unauthorized_client&error_description=ESIA-007005%3A+The+client+is+not+authorized+to+request+an+access+token+using+this+method.&resource-type=esia&state=02764f8e-9d80-420c-b714-2e40e647ae00
200 https://spb.tele2.ru/redirect-processing?error=unauthorized_client&error_description=ESIA-007005%3A+The+client+is+not+authorized+to+request+an+access+token+using+this+method.&resource-type=esia&state=02764f8e-9d80-420c-b714-2e40e647ae00 178.248.237.55 client_redirect javascript https://tele2.ru/lk/profile?pageParams=esiaStatus%3DcheckError