无法拖入，中间顶部功能按钮不显示。

fasty.min.js:9 template error >>> SyntaxError: Unexpected token '?'
at new Function ()
at Fasty.render (fasty.min.js:9)
at BsFormBuilder._renderTemplate (bs-form-builder.js:1594)
at BsFormBuilder._initActionButtons (bs-form-builder.js:938)
at bs-form-builder.js:712
at initComponents (bs-form-builder.js:990)
at BsFormBuilder._initComponents (bs-form-builder.js:1003)
at BsFormBuilder._initBuilderMode (bs-form-builder.js:709)
at new BsFormBuilder (bs-form-builder.js:642)
at HTMLDivElement. (bs-form-builder.js:2673)
render @ fasty.min.js:9
fasty.min.js:9 template >>> {{text}}
render @ fasty.min.js:9