I have had success with an inexpensive serial-to-USB adapter based on the FTDI chip set. Mine cost $19.95 when I bought it in 2014.

I tried to get an amazon link to it, but it's so old that the link didn't work any more.

Here's a similar class of product which might work for you. It's inexpensive, so it if it doesn't work you're not out that much money.
https://www.amazon.com/Sabrent-Serial-Adapter-Chipset-CB-FTDI/dp/B006AA04K0/