# CrewAI Studio fails to start execution with error 500

**URL:** <https://community.crewai.com/t/crewai-studio-fails-to-start-execution-with-error-500/7779>\
**Category:** General\
**Created:** [September 9, 2026, 10:31am UTC](https://community.crewai.com/t/crewai-studio-fails-to-start-execution-with-error-500/7779 "2026-09-09T10:31:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Irina\_Entina](https://sea1.discourse-cdn.com/flex025/user_avatar/community.crewai.com/irina_entina/32/5261_2.png) [@Irina\_Entina](https://community.crewai.com/u/Irina_Entina)\
**Post date:** [September 9, 2026, 10:31am UTC](https://community.crewai.com/t/crewai-studio-fails-to-start-execution-with-error-500/7779/1 "2026-09-09T10:31:02Z")

</div>

I am getting `Failed to start execution / Failed to run automation (500)` in CrewAI Studio.  
I tested the issue with a minimal setup: one agent, one simple task, no external tools, and an explicitly assigned model `Meta-Llama-3.3-70B-Instruct`.  
The LLM connections appear active, but the execution still fails immediately before any trace is created.  
Please check the project/account execution backend and the LLM connection on your side.