...maybe temporary error.
Try again, using server command:
sm_reloadadmins
You should also mention, are you using any other admin manager, such like SourceBans which is not default SourceMod plugin.
With server command:
sm_dump_admcache
...you get admin cache from memory to in dump file, you can read what really happen.
-------------------------------------------------
Whole error look like this
Code:
sm_reloadadmins
L 08/08/2020 - 12:53:52: [admin-flatfile.smx] Error(s) detected parsing addons\sourcemod\configs\admin_groups.cfg
L 08/08/2020 - 12:53:52: [admin-flatfile.smx] (line 158) Section declared with unknown tokens
L 08/08/2020 - 12:53:52: [admin-flatfile.smx] Error(s) detected parsing addons\sourcemod\configs\admin_groups.cfg
L 08/08/2020 - 12:53:52: [admin-flatfile.smx] (line 158) Section declared with unknown tokens
L 08/08/2020 - 12:53:52: [admin-flatfile.smx] Error(s) detected parsing addons\sourcemod\configs\admins.cfg
L 08/08/2020 - 12:53:52: [admin-flatfile.smx] (line 41) Unknown group "Scripter"
L 08/08/2020 - 12:53:52: [admin-flatfile.smx] (line 48) Unknown group "Scripter"
L 08/08/2020 - 12:53:52: [basecommands.smx] "Console<0><Console><Console>" refreshed the admin cache.
[SM] Admin cache has been refreshed.
So in line 155 you have missing value
Code:
line 155 (in Admin group) "sm_admin"