We are users of matomo for a few months, since the implementation we have not had problems.
I manage a high demand site and today (August 8, 2019) within the administrative area, I found an orange warning message that says: "/ matomo / vendor / davaxi / sparkline / src / Sparkline / FormatTrait .php (193): Notice - A non well formed numeric value encountered - Matomo 3.11.0 "
I didn’t find anything about it for version 3.11.0 which is the last one released and we have it installed.
Anybody knows what could be the problem?
Greetings from the city of Mexico CDMX at the National Polytechnic Institute (IPN).