Hello,
seems that your Joomla! /component/ or /componeent/com_sef/ directories are unwriteable. Please make sure that the user account under which your webserver is running has sufficient permissions (read & write) in given directories. The user should be able to write at least to:
/administrator/components/
/mambots/system/
/components/
Also make sure that when the user creates new directory (com_sef), the directory has set the permissions so that more files can be written to it. This may be set under Joomla! global configuration or directly in your OS.
Best regards,
Honza