As a part of report installation, install module tries to access the unzipped report files at installation path and communicates with SQL Reporting services to publish the report files.
The above errors occur when MBAM cannot access the files/folders at unzipped Installation path.
Verify that IIS is installed and correctly configured.
Verify that the registry key HKLM\SOFTWARE\Microsoft\Inet Stp: Path WWWRoot exists and accessible.
Verify that the user who is running the MBAM setup has remove permissions on the SSRS instance that is configured as an SRS Role point in CM.