Awstats not updating in Plesk

You are checking your stats and see low traffic:

How to recalculate AWStats statistics from logs for previous months. Follow this link for a plesk article:

https://support.plesk.com/hc/en-us/articles/213901965-How-to-recalculate-AWStats-statistics-from-logs-for-previous-months

Plesk Administration: https://docs.plesk.com/en-US/onyx/advanced-administration-guide-linux/statistics-and-logs/calculating-statistics.68650/

Another issue had to do with a bug in plesk.

Check your Plesk Web Statistics at the bottom of the page:

The most frequent HTTP Status code is “301 – Moved permanently (redirect)” at https://domain.com/plesk-stat/webstat/. It takes 49.5%.

In addition, “Permanent SEO-safe 301 redirect from HTTP to HTTPS” is checked under Domains > domain.com > Hosting Settings > Security section.

In this way the SSL traffic is not shown under Domains > domain.com > Web Statistics.

This issue was caused by a product defect. A bug has been already created: PPPM-548: SSL traffic is not shown in webstat.

More information here:
https://docs.plesk.com/release-notes/onyx/change-log/

To view the statistics:

Access SSL traffic statistics using the link below:
https://domain.com/plesk-stat/webstat-ssl/

Please, see the following article in order to get more information on the issue:
https://support.plesk.com/hc/en-us/articles/213951505