To fix internet access errors, you should start by trying the following steps:

1. Check the connections from the router to the modem and from the modem to the wall outlet.
2. If all looks good, try to reboot your modem and router.
3. Check your devices’ connection settings, such as network name and password.
4. Run a speed test to ensure that you are receiving the expected connection speed.
5. If the issue persists, contact your internet service provider (ISP) for additional support.