try:
1. Uninstall and reinstall uiDivStats
or,
2. From the uiDivStats menu, do a force update (option uf)
see if that works.
Tried both ... still getting the same error
gnuplot: error while loading shared libraries: libreadline.so.8: cannot open shared object file: No such file or directory
uiDivStats: Diversion statistic generation completed successfully!