# Issue connecting RASA PRO CALM with LLM on self-hosted vllm server: Hosted\_vllmException - 'str' object has no attribute 'model\_dump'

**URL:** <https://forum.rasa.com/t/issue-connecting-rasa-pro-calm-with-llm-on-self-hosted-vllm-server-hosted-vllmexception-str-object-has-no-attribute-model-dump/64640>\
**Category:** Rasa CALM\
**Tags:** rasa\
**Created:** [November 26, 2024, 5:38pm UTC](https://forum.rasa.com/t/issue-connecting-rasa-pro-calm-with-llm-on-self-hosted-vllm-server-hosted-vllmexception-str-object-has-no-attribute-model-dump/64640 "2024-11-26T17:38:20Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![vamshi2592](https://avatars.discourse-cdn.com/v4/letter/v/3da27b/32.png) [@vamshi2592](https://forum.rasa.com/u/vamshi2592)\
**Post date:** [November 28, 2024, 11:54am UTC](https://forum.rasa.com/t/issue-connecting-rasa-pro-calm-with-llm-on-self-hosted-vllm-server-hosted-vllmexception-str-object-has-no-attribute-model-dump/64640/3 "2024-11-28T11:54:12Z")

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It was a proxy issue between the VMs that hosted RASA and LLM which our networking team figured out and fixed it.

No issues from RASA config. Worked like a charm. Thanks @Lauren-Goerz . Appreciate your quick response 🙂

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_[View the full topic](https://forum.rasa.com/t/issue-connecting-rasa-pro-calm-with-llm-on-self-hosted-vllm-server-hosted-vllmexception-str-object-has-no-attribute-model-dump/64640)._