Issue with the like counter to 0 on my blog but not on the

For some time now, all the like counters have been at 0 on my blog. I specify that my blog is 6 years old. I have over 300 articles and many likes on each one. I do not understand what is happening. I wonder what has changed. Is it in the Facebook web app, what should I check? Thank you for your help

Asked about 2 months ago