I am having the issues with my workbench and its showing me the blank page with no errors on it.
Here is the console execution
gulp serve
Build target: DEBUG
[11:08:42] Using gulpfile C:\users\xxxxxx
versions
\gulpfile.js
[11:08:42] Starting gulp
[11:08:42] Starting 'serve'...
[11:08:42] Starting subtask 'configure-sp-build-rig'...
[11:08:42] Finished subtask 'configure-sp-build-rig' after 9.51 ms
[11:08:42] Starting subtask 'spfx-serve'...
[11:08:43] Starting server...
Starting api server on port 5432.
Registring api: /getwebparts
Registring api: /.
Registring api: /workbench
[11:08:43] Finished subtask 'spfx-serve' after 787 ms
[11:08:43] Starting subtask 'pre-copy'...
[11:08:43] Finished subtask 'pre-copy' after 20 ms
[11:08:43] Starting subtask 'copy-static-assets'...
[11:08:43] Starting subtask 'sass'...
[11:08:44] Server started https://localhost:4321
[11:08:44] LiveReload started on port 35729
[11:08:44] Running server
[11:08:44] Opening https://localhost:5432/workbench using the default OS app
[11:08:44] Finished subtask 'sass' after 1.46 s
[11:08:44] Starting subtask 'tslint'...
[11:08:46] Starting subtask 'typescript'...
[11:08:46] [typescript] TypeScript version: 2.4.2
[11:08:46] Finished subtask 'copy-static-assets' after 2.53 s
Warning: no-duplicate-case rule is deprecated. Replace your usage with the TSLint no-duplicate-switch-case rule.
Warning: valid-typeof rule is deprecated. Replace your usage with the TSLint typeof-compare rule.
Request: [::1] '/workbench'
[11:08:46] Finished subtask 'tslint' after 1.47 s
Request: '/temp/workbench.html'
[11:08:47] Finished subtask 'typescript' after 1.51 s
[11:08:47] Starting subtask 'ts-npm-lint'...
[11:08:47] Finished subtask 'ts-npm-lint' after 12 ms
[11:08:47] Starting subtask 'api-extractor'...
[11:08:47] Finished subtask 'api-extractor' after 3.38 ms
[11:08:47] Starting subtask 'post-copy'...
[11:08:47] Finished subtask 'post-copy' after 603 μs
[11:08:47] Starting subtask 'collectLocalizedResources'...
Request: '/temp/manifests.js'
[11:08:47] Finished subtask 'collectLocalizedResources' after 8.56 ms
[11:08:47] Starting subtask 'configure-webpack'...
[11:08:48] Finished subtask 'configure-webpack' after 1.09 s
[11:08:48] Starting subtask 'webpack'...
Request: '/node_modules/@microsoft/sp-webpart-workbench/lib/api/workbenchInit.js'
Request: '/node_modules/@microsoft/sp-loader/dist/sp-loader_en-us.js'
[11:08:49] Finished subtask 'webpack' after 1.07 s
[11:08:49] Starting subtask 'configure-webpack-external-bundling'...
[11:08:49] Finished subtask 'configure-webpack-external-bundling' after 1.59 ms
[11:08:49] Starting subtask 'copy-assets'...
[11:08:49] Finished subtask 'copy-assets' after 13 ms
[11:08:49] Starting subtask 'write-manifests'...
[11:08:50] Finished subtask 'write-manifests' after 1.21 s
[11:08:50] Starting subtask 'reload'...
[11:08:50] Finished subtask 'reload' after 4.53 ms
Request: '/temp/workbench.html'
Request: '/temp/manifests.js'
Request: '/node_modules/@microsoft/sp-loader/dist/sp-loader_en-us.js'
Request: '/nod