We have provided a registry protected fix, some users confirmed that this worked for them.
Could you please try this at your end as well and let us know your feedback?
Kindly make sure you are on the latest DC build(20.012.20043) and then follow the steps from the attached word file: “Steps.docx”.
An error occurred while saving the commentAndy White commented
I have this issue also;
1. Acrobat Version 2018.011.20040
2. macOS 10.12.6
3. Time to display comments panel: 30 secs (Current file has 33 comments)
However this is independent of the amount of comments contained in a PDF as it still takes 30 secs even when the PDF on my mac contains no comments.