Your online course is conducted in a learning management system (e.g., Canvas), and students will need a minimum set of digital skills, an Internet connection, and a working device in order to complete the course requirements. You can preempt technology-related excuses by sharing your policy regarding them.
Your syllabus language might include:
“Technology-related excuses: not accepted! An online course does not necessarily mean a “from home” course. If your personal computer does not have the necessary capabilities or if you experience connection difficulties, you must find alternative computer resources. That your computer or Internet wasn’t working are not acceptable excuses for missed assignments or deadlines. Here are the locations of campus computer labs.”