Moodle is due to be upgraded during the week commencing 2nd August. Whilst actual downtime will be kept to a minimum, certain restrictions will be in operation and it won't be possible for users to upload content to Moodle (or otherwise amend courses) until the upgrade has been completed. Further details/updates are available from the TEL Service Blog - accessible via the 'More' link:
Students experiencing difficulties accessing Moodle courses should contact their programme team for guidance - they can check that you are correctly enrolled onto the unit in SAMIS, and can work with others to ensure that any access issues are resolved quickly.
Questions related to course content may be better directed to the unit convenor (Teacher+).