UI Tars 7B and Midscene.js 413 error after a few steps

When using UI tars 7B with midscene.js after few steps it always errors out with:

error
failed to call AI model service: 413 Failed to buffer the request body: length limit exceeded.

Following this guide for setup:

https://juniper-switch-f10.notion.site/UI-TARS-Model-Deployment-Guide-17b5350241e280058e98cea60317de71

"error": "failed to call AI model service: 413 Failed to buffer the request body: length limit exceeded. Trouble shooting: https://midscenejs.com/model-provider.html",
"errorStack": "Error: failed to call AI model service: 413 Failed to buffer the request body: length limit exceeded. Trouble shooting: https://midscenejs.com/model-provider.html\n at et (chrome-extension://gbldofcpkknbggpkmbdaefngejllnief/static/js/205.c3b16320.js:427:1539)\n at async eg (chrome-extension://gbldofcpkknbggpkmbdaefngejllnief/static/js/205.c3b16320.js:478:1937)\n at async Object.executor (chrome-extension://gbldofcpkknbggpkmbdaefngejllnief/static/js/index.986d99d1.js:560:7348)\n at async l.flush (chrome-extension://gbldofcpkknbggpkmbdaefngejllnief/static/js/205.c3b16320.js:480:1660)\n at async eb.actionToGoal (chrome-extension://gbldofcpkknbggpkmbdaefngejllnief/static/js/index.986d99d1.js:560:9168)\n at async ex.aiAction (chrome-extension://gbldofcpkknbggpkmbdaefngejllnief/static/js/index.986d99d1.js:561:1420)\n at async chrome-extension://gbldofcpkknbggpkmbdaefngejllnief/static/js/index.986d99d1.js:575:5824"
}

Reproduce the UI Tars 7B and Midscene.js flow using the linked UI-TARS Model Deployment Guide, and review the model-provider guidance referenced in the error. Trace where the 413 request-body limit is applied and document the configuration or request-handling change needed so several steps complete without the error.

Written by the indexing model from the issue text.