Hello Olivia!
I hope you are doing well. Have you tried the suggestions from our community product expert?
Ensure the PDF contains interactive form fields. Open the PDF, go to itTools > Prepare Form, and check if the fields are editable. See this article for more information: How to make a PDF form fillable | Adobe Acrobat DC
Verify that the security settings allow form filling. Go to File > Properties > Security and ensure form filling is permitted. Please ensure you have the latest version of Acrobat installed on the machine: 25.001.2043x Optional update, Mar 19, 2025. Check for any pending updates from the Menu > help > check for updates, install the updates, restart the app and the machine, and check. For more information, see this: https://adobe.ly/4iZTGoE
For testing purposes, Disable Enhanced Security: Go to Menu > Preferences > Security (Enhanced) and disable Enhanced Security and Protected View. Restart Acrobat. Please enable the security settings after testing.
Let us know how it goes.
Thanks,
Anand Sri.