### Board ALL ### Device Description NONE ### Hardware Configuration NO ### Version latest master ### IDE Name NONE ### Operating System GNU/Linux ### Flash frequency 40Mhz ### PSRAM enabled no ### Upload speed 115200 ### Description see title ### Sketch ```cpp Ticker t; bool act = t.active(); ``` ### Debug Message ```plain undefined reference to `Ticker::active()' ``` ### Other Steps to Reproduce _No response_ ### I have checked existing issues, online documentation and the Troubleshooting Guide - [X] I confirm I have checked existing issues, online documentation and Troubleshooting guide.