Does anyone have tips on troubleshooting when TextIQ tells you you don't have a valid JSON file?

Hello... I recently created a JSON file to assign a number of keywords to a topic for Text IQ. I do not have the upgraded version - just the basic.

>> I started from an export of my Topics file.
>> I edited it in Notepad
>> I validated my code with an online validation system. (https://jsonlint.com/)
>> I saved the file as a .json with ANSI encoding
>> I attempted to uploaded the file for import and got the following message:

"There was a problem reading the file 'Passive VOC - Q2_ What do you like or dislike_ - Topics.json'. Check that your file is a valid JSON file."

Any troubleshooting tips someone can offer to get this to work? I already had a bunch of word match lists saved and was hoping to create them through the file for import to avoid manual tagging.

Thanks so much!

Best,

Mary