One of our developers randomly experienced an issue where the Lightning options are gone except Lightning Tokens. Even in the shortcuts section  all lightning shortcuts are gone. The change seemed to happen suddenly. We've tried to create a new user, but any new user seems to have a similar issue. No other existing developer has experienced this issue. Attached is a screen shot showing the missing items. 

In Lightning Communities does the new page level feature to 'Edit Meta Tags' work for IE 11? When we add simple meta tags we get the following error, but all other browsers worked: Action failed: forceCommunity:seoAssistant$controller$init [Object doesn't support property or method 'forEach'] Callback failed: serviceComponent://ui.comm.runtime.components.aura.components.siteforce.controller.PubliclyCacheableComponentLoaderController/ACTION$getPageComponent