Today I was shocked as I saw the citation of my articles become zero, which was 101 in the morning, given that there are citations for each articles individually
This happened for all users, not only for you. Obviously, there is a technical problem. We have to wait until the team will fix this bug. - The citations for individual publications are displayed as previously, the problem seems to concern only the sum of all citation numbers.
This morning I had the impression that this issue concerned all users. Now I see that this was not true or that for many users the problem has been fixed. If the issue has been fixed generally, it may take a while until all citation stats will be restored.