Error in py_convert_pandas_df(x)

Hello!

I have a fresh Rstudio where i want to work with some data which come from python scripts. On RStudio I installed: tidyverse, openxlsx, xlsx, data.table, janitor, anytime, tinytex, zoo, ggrepel, gridExtra, reticulate, rmarkdown, kableExtra, dplyr,

run the following:
tinytex::install_tinytex()

And although i had anaconda3 installed on my computer, rstudio didn't recognize it, I got the following:
No non-system installation of Python could be found.
Would you like to download and install Miniconda?
Miniconda is an open source environment management system for Python.
See https://docs.conda.io/en/latest/miniconda.html for more details.

Would you like to install Miniconda? [Y/n]: Y

After I installed:
environment location: C:\Users\nora\AppData\Local\r-miniconda\envs\r-reticulate

added / updated specs:
- numpy
- python=3.6

Then installed numpy, pandas, xlrd with the following method:
reticulate::py_install("pandas")

And when I try to run the following part:
for(py_file in py_files) reticulate::source_python(paste0(project_folder, py_file))

I got this error message:
Error in py_convert_pandas_df(x) :
SystemError: <built-in method item of numpy.ndarray object at 0x000001CEE400AA30> returned a result with an error set

After two days of debugging this mysterious error code any help would be appreciated. I already tried to reinstall r, rstudio, python and ot the same error.

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