Math Module shows locks on my students' computers.

[Bhaktkd]

Title. I have deleted irrelevant images, and my students can see only locks.

[Chris_Hofer]

Good morning, @Bhaktkd ...

Based on your question, it sounds like your students are seeing a padlock icon on your course "Modules" page similar to what is described in this Student Guide: How do I view Modules as a student? - Canvas Community.  If this is the case, you may need to look at your course Prerequisites and/or Requirements that may be configured for one or more modules in your course.  Here are a couple Guides for you:

• How do I add prerequisites to a module? - Canvas Community
• How do I add requirements to a module? - Canvas Community

I hope these resources will be of help to you.  Sing out if you have any other questions about this...thanks!  Take care, stay safe, and be well.