I am using Circos visualizes data in a circular layout (Galaxy Version 0.69.8+galaxy4) and it is giving fatal error since the 15th, after your maintenance.
I am using usegalaxy.org
Use of uninitialized value in subroutine entry at /cvmfs/main.galaxyproject.org/deps/_conda/envs/mulled-v1-dd38f3b35796eaa94d0b5d1d9c1428ec987dcd7f39e81a08df8df138203a8004/bin/…/lib/Circos/Configuration.pm line 781.
Can’t call method “colorExact” on an undefined value at /cvmfs/main.galaxyproject.org/deps/_conda/envs/mulled-v1-dd38f3b35796eaa94d0b5d1d9c1428ec987dcd7f39e81a08df8df138203a8004/bin/…/lib/Circos/Colors.pm line 348, line 6.