can't move timeline markers

[frafor521521]

Please i need your help! After the last update i can't move the timeline markers, neither for the multiple framse selection nor for the onionskin frame range. Anyone had the same trouble or some suggestion? 

[kglad]

no problem for me editing multiple frames with version 20.5.1

restart your computer and reopen animate.  check if the problem is with all fla files or just one.

if all flas are problematic after restarting, reset your preferences - https://helpx.adobe.com/animate/using/set-preferences.html