Can not add Media to Unit in Course

Hi, i am developing lms site, but i have been facing one issue. my issue is , when i make new course , i go to the course from front end and add curriculum to it, i add unit and when adding media to it, it just shows blank dark screen and nothing happens.     jquery-migrate.js:23JQMIGRATE: Migrate is installed with logging active, version 1.4.1 </div> jquery-migrate.js:45JQMIGRATE: jQuery.fn.load() is deprecated </div> </div> </div> </div> jquery-migrate.js:47console.trace migrateWarn @ jquery-migrate.js:47 </div> </div> </div> </div> jquery-migrate.js:45JQMIGRATE: jQuery.attrFn is deprecated </div> </div> </div> </div> jquery-migrate.js:47console.trace migrateWarn @ jquery-migrate.js:47 </div> </div> </div> </div> cyber-academy.t-scop.com/:17events_active </div> jquery-migrate.js:45JQMIGRATE: jQuery.fn.live() is deprecated </div> </div> </div> </div> jquery-migrate.js:47console.trace migrateWarn @ jquery-migrate.js:47 </div> </div> </div> </div> 3 tinymce.min.js?ver=4800-20180716:2Active resource loading counts reached to a per-frame limit while the tab is in background. Network requests will be delayed until a previous loading finishes, or the tab is foregrounded. See https://www.chromestatus.com/feature/5527160148197376 for more details </div> jquery.js?ver=1.12.4:5[Intervention] Slow network is detected. See https://www.chromestatus.com/feature/5636954674692096 for more details. Fallback font will be used while loading: https://cdn.iflychat.com/font/bootstrap/glyphicons-halflings-regular.woff2 </div> iflychat-app-v2.8.13.min.js:2[Intervention] Slow network is detected. See https://www.chromestatus.com/feature/5636954674692096 for more details. Fallback font will be used while loading: https://cdn.iflychat.com/font/iflychat-app-v2.5.0.woff </div> index.js:348You are currently using minified code outside of NODE_ENV === 'production'. This means that you are running a slower development build of Redux. You can use loose-envify (https://github.com/zertosh/loose-envify) for browserify or DefinePlugin for webpack (http://stackoverflow.com/questions/30030031) to ensure you have the correct code for your production build. </div> </div> </div> </div> cyber-academy.t-scop.com/:17events_active </div> wplms_front_end.min.js:10 </div> theme.js?wp-mce-4800-20180716:1538[Intervention] Slow network is detected. See https://www.chromestatus.com/feature/5636954674692096 for more details. Fallback font will be used while loading: https://cyber-academy.t-scop.com/wp-includes/js/tinymce/skins/lightgray/fonts/tinymce.woff </div> DevTools failed to parse SourceMap: https://cyber-academy.t-scop.com/wp-includes/js/tinymce/skins/lightgray/skin.min.css.map </div> </div> <span class="console-message-text" style="min-width: 0px; min-height: 0px; box-sizing: border-box; color: #5c3c00;"><span class="devtools-link" style="min-width: 0px; min-height: 0px; box-sizing: border-box; color: #545454; text-decoration-line: underline; cursor: pointer; word-break: break-all;">this is console error and warnings.</span></span>   thanks