CommonLit 360 Reading Lessons
If you assigned a lesson from the CommonLit 360 Curriculum, then it sounds like you have enabled Required Answers to Instructional In-Text Questions.
When enabled, this feature means students will have the text chunked for them by guided questions. Students will not be able to unlock the next chunk of text without responding to the In-Text Questions.
Supplemental Lessons in the CommonLit Digital Library
Sounds like you may have enabled Guided Reading Mode while assigning the text. This causes the text to be blurry for students. Here's a quick video to introduce you to this CommonLit Digital feature! Click on the link to view the video.
If you didn't mean to enable Guided Reading mode, you can disable it by editing your assignment. If you meant to enable it and students are confused, be sure to explain to them how the tool works; you can use this video as a guide: