<simpleError in collapse_object(objnames, tmp, indent): R character strings are limited to 2^31-1 bytes>

## Project Robyn

## Describe issue
with 2000 iterations and 5 trials

## Provide reproducible example
Issues are often related to custom input data that is difficult to debug without. If necessary, please modify your data to mask real values and share a dataset that is able to reproduce the issue. Please also share your model configuration and exported JSON files if available.

## Environment & Robyn version
Make sure you're using the latest Robyn version before you post an issue.
- Check and share Robyn version: `packageVersion("Robyn")`
- R version (Please, check and share: `sessionInfo()` or `R.version$version.string`)

Robyn version 3.11.1 and R 4.0.0