yarn start client failed

[lingjianrui]

Hi Guys,

I got this error below while execute "yarn start client" on mac catalina. but these is no problem on high sierra.
Please help to fix this.
Many Thanks.

ERROR in /Users/lingjianrui/project/flogo-web/libs/plugins/flow-client/src/lib/triggers/trigger-block/trigger-block.component.less
Module build failed (from /Users/lingjianrui/project/flogo-web/node_modules/less-loader/dist/cjs.js):

.bg-placeholder {
  fill: @color-trigger-hover-bg-color;
      ^

Variable @color-trigger-hover-bg-color is undefined
in /Users/lingjianrui/project/flogo-web/libs/plugins/flow-client/src/lib/triggers/trigger-block/trigger-block.component.less (line 23, column 12)
ERROR in /Users/lingjianrui/project/flogo-web/libs/plugins/stream-client/src/lib/triggers/trigger-block/trigger-block.component.less
Module build failed (from /Users/lingjianrui/project/flogo-web/node_modules/less-loader/dist/cjs.js):

&:hover {
background-color: @color-trigger-hover-bg-color;
^
Variable @color-trigger-hover-bg-color is undefined
in /Users/lingjianrui/project/flogo-web/libs/plugins/stream-client/src/lib/triggers/trigger-block/trigger-block.component.less (line 20, column 22)
ERROR in /Users/lingjianrui/project/flogo-web/libs/plugins/flow-client/src/lib/triggers/configurator/trigger/trigger.component.less
Module build failed (from /Users/lingjianrui/project/flogo-web/node_modules/less-loader/dist/cjs.js):

.trigger-content {
background-color: @color-trigger-hover-bg-color;
^
Variable @color-trigger-hover-bg-color is undefined
in /Users/lingjianrui/project/flogo-web/libs/plugins/flow-client/src/lib/triggers/configurator/trigger/trigger.component.less (line 34, column 22)
ERROR in /Users/lingjianrui/project/flogo-web/libs/plugins/stream-client/src/lib/triggers/configurator/trigger/trigger.component.less
Module build failed (from /Users/lingjianrui/project/flogo-web/node_modules/less-loader/dist/cjs.js):

.trigger-content {
background-color: @color-trigger-hover-bg-color;
^
Variable @color-trigger-hover-bg-color is undefined
in /Users/lingjianrui/project/flogo-web/libs/plugins/stream-client/src/lib/triggers/configurator/trigger/trigger.component.less (line 34, column 22)
ERROR in /Users/lingjianrui/project/flogo-web/libs/lib-client/diagram/src/lib/diagram/diagram-row.component.less
Module build failed (from /Users/lingjianrui/project/flogo-web/node_modules/less-loader/dist/cjs.js):

@import '../_styles';
@import '~@flogo-web/assets/styles/_drag-drop-animation';
^
Can't resolve '@flogo-web/assets/styles/_drag-drop-animation.less' in '/Users/lingjianrui/project/flogo-web/libs/lib-client/diagram/src/lib/diagram'
in /Users/lingjianrui/project/flogo-web/libs/lib-client/diagram/src/lib/diagram/diagram-row.component.less (line 2, column 0)
ERROR in /Users/lingjianrui/project/flogo-web/libs/plugins/stream-client/src/lib/stream-diagram/stream-diagram.component.less
Module build failed (from /Users/lingjianrui/project/flogo-web/node_modules/less-loader/dist/cjs.js):

@import (reference) '@flogo-web/assets/styles/_variables';
@import '@flogo-web/assets/styles/_drag-drop-animation';
^
Can't resolve '@flogo-web/assets/styles/_drag-drop-animation.less' in '/Users/lingjianrui/project/flogo-web/libs/plugins/stream-client/src/lib/stream-diagram'
in /Users/lingjianrui/project/flogo-web/libs/plugins/stream-client/src/lib/stream-diagram/stream-diagram.component.less (line 2, column 0)