Hello,

error case: 

user have all administration right, when I login first clic I see AM home page for 2seconds then redirected to error login page see  image 1.

I clic a second time and i get the message that user is alredy connected

Configuration: 

Database
Base: Name SQLSERVER_DS_V1
Engine MSSQL
User xxxxxx
ExpandTypedLinks '|amDocument|amWfWorkItem|amHistory|amReconcProposal'
FetchingArraySize 30
AmApiDll 'C:/lib/aamapi98.dll'
User: Admin
Version: 9.80 - build 21104
Dll path: C:\lib\aamapi98.dll
Connection pool
Reset the connection pool
Single Sign-On(SSO) configuration
Reset the SSO configuration

Java: Version 1.8.0_202
VM Vendor Oracle Corporation
VM Version 25.202-b08
OS: Name Windows Server 2016
Version 10.0
Architecture amd64
Exposed Web Services by version

websrv + webtier : the same tomcat on the same machine windows 2019