Hi Juan,
Please check and try the followings:
1. Unpack SUM is done by OS user <sid>adm (Run as administrator in Windows command line).
2. Update Host Agent as required
3. Register SUM in SAP Host Agent by OS user <sid>adm (Run as administrator in Windows command line).
4. Input http://xx0-ci:1128/lmsl/sumabap/XX0/doc/sluigui in web browser without /
Regards,
Ning