The instructions on https://github.com/tomasss1024/openlp_chords are the correct instructions....you have to:<br>
Create the formatting tags...information is in the readme file at the bottom of the page..The manual has instructions to lead you through creating the formatting tags.
Create the custom stage view... the files are on the same site, you have to drill into the directory to get the actual files. Check out the manual for where to put the files.
You have to modify the text to add the "chord" information.
I've done this with 2.4.6 using the information on the site listed above. Please note directories may have changed so use the directories in the manual.