Hope you are doing well and thanks for reaching out.
Is this an issue with a particular PDF file or with all the PDFs? Please try with a different PDF file and check. If the file is stored on a shared network/drive please download it to your computer locally and then try again.
You may also try to create a new test user profile with full admin rights or enable the root account in MAC and try using the application there and check.
If it still doesn't work, please collect the Crash/freeze logs as described here https://helpx.adobe.com/acrobat/kb/collect-logs-crash-freeze.html and share them via any cloud storage. Just upload the log file to the cloud and generate the link and share that link with us for further investigation.
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