Queued tracking plugin

Hi all,
I has installed the Queued Tracking Plugin with Mysql and since then I got " MYSQL SERVER HAS GONE AWAY" error several times.

I followed the How-to to fix this issue (https://matomo.org/faq/troubleshooting/faq_183/) but it didn’t fix it.
Does any one have any other suggestion to fix this issue?

Thank you
Oswaldo