Normally we would need debug to be able to provide a solution but I would first recommend to recheck the setup since this is a new configuration which never worked before :
So please refer to this complete step by step guides
After checking the configuration ,I would kindly ask you to run the following debugs, and try to reproduce the issue:
diag debug reset
diag debug console timestamp enable
diag debug app samld -1
diag debug app sslvpn -1
diag debug enable
Please also note the username used in the test, which group should the user be a member of and which SSLVPN portal you expect the user to be mapped to.
Also please refer to the last session on this article for the mos common issues and misconfigs
Please let us know the outcome and if the issue still persists
A problem well-defined is a problem half solved.