I am afraid I cannot help you any further. Last time I used these scripts was in 2018 or 2019. I don't have any old ACE config files to reproduce what I did back then. Sorry.
meanwhile I went through my archive and dug out the PDF "Getting Started Guide, Cisco ACE Control Engine Module". I took three of configuration examples from this book and tested them with the ace2f5 converter.
Example: python3 ace2f5.py -f ./ace-config-example1.txt
The result was always the same - it generated a couple of error message on the CLI and it generated three files. One .csv file with the config objects that the script discovered, one log file with the extension .log-yyyyMMddHHMM and one file with the extension .checking-yyyyMMddHHMM.
In the file with the extension .checking-... I found all the config snippets I needed for tmsh load sys config from-terminal merge.
Do you get any error when you run the script or any other output on the shell?