Grunt运行报错一直找不到都说是lesshat.less

Running "less:dev" (less) task

FileError: 'lesshat.less' wasn't found. Tried - /home/kibana-master/src/kibana/components/agg_table/lesshat.less,/home/kibana-master/src/kibana/bower_components/lesshat/build/lesshat.less,lesshat.less in /home/kibana-master/src/kibana/components/agg_table/agg_table.less on line 1, column 1: 1 @import (reference) "lesshat.less"; 2 @import (reference) "../../styles/theme/_variables.less"; Warning: Error compiling /home/kibana-master/src/kibana/components/agg_table/agg_table.less Use --force to continue.

Aborted due to warnings.

Process finished with exit code 6 报错lesshat.less没有找到，google到是说要bower install，bower已经装了，可还是这个错～请问各路大神谁有知道的，帮忙解释下可以不？谢谢～