You can report bugs on the UtilityBelt issues page or on the ACPluginsDev Discord in #utilitybelt
Logs Files
You may be asked to provide logs, which can be found in the following directories:
Character Logs: %USERPROFILE%\Documents\Decal Plugins\UtilityBelt\<server>\<character>\logs\
Exception Logs: %USERPROFILE%\Documents\Decal Plugins\UtilityBelt\
If you modified UtilityBelt.dll.config the above paths may differ.