After I have upgraded my site to the V 1.8.0 anonymous avatar no longer Appear in q-list or questions or others .So please who have any idea about this problem can help us find out what happend
That will be fixed in the yet unreleased v1.8.1. It is, however, already fixed in the bugfix branch you can download from here: https://github.com/q2a/question2answer/archive/bugfix.zip
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.
April 20, 2021: Q2A 1.8.6 released!