Uncaught exception on SolidityCodeEditor

[anmavrid]

When clicking the "go to parent" link from the Solidity code editor:

Uncaught TypeError: Cannot read property 'getAttribute' of null
    at SolidityCodeEditorControl.selectedObjectChanged (:8888/extlib/src/visualizers/panels/SolidityCodeEditor/SolidityCodeEditorControl.js:73)
    at SolidityCodeEditorControl._stateActiveObjectChanged (:8888/extlib/src/visualizers/panels/SolidityCodeEditor/SolidityCodeEditorControl.js:291)
    at b (:8888/dist/webgme.2.17.1.lib.build.js:25)
    at v (:8888/dist/webgme.2.17.1.lib.build.js:25)
    at d (:8888/dist/webgme.2.17.1.lib.build.js:25)
    at H.i.c.trigger (:8888/dist/webgme.2.17.1.lib.build.js:25)
    at H.i.set (:8888/dist/webgme.2.17.1.lib.build.js:25)
    at H.i.registerActiveObject (:8888/dist/webgme.2.17.1.dist.build.js:12)
    at HTMLAnchorElement.clickFn (:8888/dist/webgme.2.17.1.dist.build.js:23)
    at HTMLAnchorElement.<anonymous> (:8888/dist/webgme.2.17.1.dist.build.js:17)

[ChenzZL]

Hello, I'm learning FsolidM and I can't click on the plugins section in the upper right corner of the program interface, what about the three plugins that don't work.