# 5.2 Kibana Plugin installation - Optimizations failure **URL:** \ **Category:** Kibana\ **Created:** [February 3, 2017, 12:16pm UTC](https://discuss.elastic.co/t/5-2-kibana-plugin-installation-optimizations-failure/73845 "2017-02-03T12:16:08Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![andrew.welburn](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrew.welburn/32/15184_2.png) [@andrew.welburn](https://discuss.elastic.co/u/andrew.welburn)\ **Post date:** [February 3, 2017, 12:16pm UTC](https://discuss.elastic.co/t/5-2-kibana-plugin-installation-optimizations-failure/73845/1 "2017-02-03T12:16:08Z")
Performing a rolling upgrade from 5.1.2 to 5.2 on Ubuntu 15.10 Installation of ElasticSearch and Kibana seem successful. I've then attempted to install the x-pack plugin for kibana: root@devu1:/usr/share/kibana# bin/kibana-plugin remove x-pack Unable to remove plugin because of error: "Plugin [x-pack] is not installed" root@devu1:/usr/share/kibana# bin/kibana-plugin install x-pack Attempting to transfer from x-pack Attempting to transfer from [https://artifacts.elastic.co/downloads/kibana-plugins/x-pack/x-pack-5.2.0.zip](https://artifacts.elastic.co/downloads/kibana-plugins/x-pack/x-pack-5.2.0.zip) Transferring 108043702 bytes.................... Transfer complete Retrieving metadata from plugin archive Extracting plugin archive Extraction complete Optimizing and caching browser bundles... Plugin installation was unsuccessful due to error "Optimizations failure. ``` ERROR in ./src/core_plugins/kibana/public/dashboard/styles/main.less Module build failed: ModuleBuildError: Module build failed: TypeError: postcss.plugin is not a function at Object. (/usr/share/kibana/node_modules/autoprefixer/lib/autoprefixer.js:32:28) at Object. (/usr/share/kibana/node_modules/autoprefixer/lib/autoprefixer.js:91:4) at Module._compile (module.js:570:32) at Module._extensions..js (module.js:579:10) at Object.require.extensions.(anonymous function) [as .js] (/usr/share/kibana/node_modules/babel-core/lib/api/register/node.js:214:7) at Module.load (module.js:487:32) at tryModuleLoad (module.js:446:12) at Function.Module._load (module.js:438:3) at Module.require (module.js:497:17) at require (internal/module.js:20:19) at Object. (/usr/share/kibana/src/optimize/postcss.config.js:4:13) at Module._compile (module.js:570:32) at requireFromString (/usr/share/kibana/node_modules/require-from-string/index.js:27:4) at /usr/share/kibana/node_modules/cosmiconfig/lib/loadJs.js:11:15 at DependenciesBlock.onModuleBuildFailed (/usr/share/kibana/node_modules/webpack/node_modules/webpack-core/lib/NormalModuleMixin.js:315:19) at nextLoader (/usr/share/kibana/node_modules/webpack/node_modules/webpack-core/lib/NormalModuleMixin.js:270:31) at /usr/share/kibana/node_modules/webpack/node_modules/webpack-core/lib/NormalModuleMixin.js:292:15 at context.callback (/usr/share/kibana/node_modules/webpack/node_modules/webpack-core/lib/NormalModuleMixin.js:148:14) at /usr/share/kibana/node_modules/postcss-loader/index.js:137:13 @ ./src/core_plugins/kibana/public/dashboard/index.js 33:0-52 ``` Have I missed a step / dependency somewhere? ---
**Author:** ![Court](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/court/32/6640_2.png) [@Court](https://discuss.elastic.co/u/Court)\ **Post date:** [February 3, 2017, 2:42pm UTC](https://discuss.elastic.co/t/5-2-kibana-plugin-installation-optimizations-failure/73845/2 "2017-02-03T14:42:24Z")
What operating system are you running Kibana on and what install mechanism did you use initially (tar, rpm, deb, source)? Also, did you stop Kibana before attempting to install x-pack? If not, can you stop the Kibana server, delete your `optimize/bundles` directory and `optimize/.babelcache.json` file, and then try to install x-pack again? ---
**Author:** ![Court](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/court/32/6640_2.png) [@Court](https://discuss.elastic.co/u/Court)\ **Post date:** [February 3, 2017, 2:49pm UTC](https://discuss.elastic.co/t/5-2-kibana-plugin-installation-optimizations-failure/73845/3 "2017-02-03T14:49:18Z")
Scratch the operating system question as you mentioned Ubuntu 15.10 in your post. ---
**Author:** ![andrew.welburn](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrew.welburn/32/15184_2.png) [@andrew.welburn](https://discuss.elastic.co/u/andrew.welburn)\ **Post date:** [February 3, 2017, 3:26pm UTC](https://discuss.elastic.co/t/5-2-kibana-plugin-installation-optimizations-failure/73845/4 "2017-02-03T15:26:39Z")
Thanks Court, I'm using the deb package, default installation locations. I've ensured kibana is not running and deleted both the bundles directory and .babelcache.json file. I then ran the installation command again, but I get the same error as above. Note that what I posted previously was just one of the errors logged, but they're generally .less files throwing the same error about postcss.plugin, the stacktrace is the same. ---
**Author:** ![LeeDr](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/leedr/32/9289_2.png) [@LeeDr](https://discuss.elastic.co/u/LeeDr)\ **Post date:** [February 3, 2017, 3:37pm UTC](https://discuss.elastic.co/t/5-2-kibana-plugin-installation-optimizations-failure/73845/5 "2017-02-03T15:37:27Z")
> [@andrew.welburn](#): > > root@devu1:/usr/share/kibana# bin/kibana-plugin remove x-packUnable to remove plugin because of error: "Plugin [x-pack] is not installed" When you remove x-pack, if it says it's installed or not, did you happen to check the `/usr/share/kibana/plugins/` directory to see if it's empty? I would expect it would be, but wouldn't hurt to check. ---
**Author:** ![andrew.welburn](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrew.welburn/32/15184_2.png) [@andrew.welburn](https://discuss.elastic.co/u/andrew.welburn)\ **Post date:** [February 3, 2017, 3:42pm UTC](https://discuss.elastic.co/t/5-2-kibana-plugin-installation-optimizations-failure/73845/6 "2017-02-03T15:42:29Z")
Thanks Lee, Yes it's empty. ---
**Author:** ![andrew.welburn](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrew.welburn/32/15184_2.png) [@andrew.welburn](https://discuss.elastic.co/u/andrew.welburn)\ **Post date:** [February 3, 2017, 4:11pm UTC](https://discuss.elastic.co/t/5-2-kibana-plugin-installation-optimizations-failure/73845/7 "2017-02-03T16:11:07Z")
Upgraded to Ubuntu 16.04.1 LTS, didn't make any difference. ---
**Author:** ![andrew.welburn](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrew.welburn/32/15184_2.png) [@andrew.welburn](https://discuss.elastic.co/u/andrew.welburn)\ **Post date:** [February 3, 2017, 8:44pm UTC](https://discuss.elastic.co/t/5-2-kibana-plugin-installation-optimizations-failure/73845/8 "2017-02-03T20:44:53Z")
Sorted! I ran apt-get purge kibana, installed kibana again, the x-pack plugin now installs fine. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [March 3, 2017, 8:44pm UTC](https://discuss.elastic.co/t/5-2-kibana-plugin-installation-optimizations-failure/73845/9 "2017-03-03T20:44:57Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.