# When I upgrade ES from 7.0.0 to 7.9.0 my custom plugin(which contain mustache) is not working

**URL:** <https://discuss.elastic.co/t/when-i-upgrade-es-from-7-0-0-to-7-9-0-my-custom-plugin-which-contain-mustache-is-not-working/255936>\
**Category:** Elasticsearch\
**Created:** [November 19, 2020, 7:21am UTC](https://discuss.elastic.co/t/when-i-upgrade-es-from-7-0-0-to-7-9-0-my-custom-plugin-which-contain-mustache-is-not-working/255936 "2020-11-19T07:21:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rakeshdkaatkar](https://avatars.discourse-cdn.com/v4/letter/r/b19c9b/32.png) [@rakeshdkaatkar](https://discuss.elastic.co/u/rakeshdkaatkar)\
**Post date:** [November 19, 2020, 7:21am UTC](https://discuss.elastic.co/t/when-i-upgrade-es-from-7-0-0-to-7-9-0-my-custom-plugin-which-contain-mustache-is-not-working/255936/1 "2020-11-19T07:21:38Z")

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I have placed lang-mustache-client-7.9.0.jar to libs and deleted lang-mustache folder from modules.But im getting below error.

TenantNull failed to find action [org.elasticsearch.script.mustache.SearchTemplateAction@76440dba] to execute

Same works in 7.0.0

Can someone please tell what im missing.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 17, 2020, 7:21am UTC](https://discuss.elastic.co/t/when-i-upgrade-es-from-7-0-0-to-7-9-0-my-custom-plugin-which-contain-mustache-is-not-working/255936/2 "2020-12-17T07:21:44Z")

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