Well, I am finding it difficult to find an update to Google Chrome browser that will work. Chrome is sometimes tricky even if you were using a current Ubuntu.
Chrome also no longer supports older 32-bit computers and operating systems, and we have not checked your computer yet to know that. Even a new install of Ubuntu would not help Chrome if your computer CPU is 32-bit. We can find that out easily by opening a Terminal (in your apps) and typing:
That's LSCPU, but all lower case. The "|" character is SHIFT + \ (just above the Enter key). You can highlight and copy all of that, and use the middle mouse button to paste into the Terminal, if you have a middle button.
After you enter that command, let us know what result prints out.
I don't think you can update Chrome on your older Ubuntu, but you probably can on a new version if the command above shows 64-bit.
Or another option may be to switch browsers. Have you ever tried Firefox? I found a link that should
work for you to install the newest version of that... but even that is not a guarantee because the older Ubuntu may still give trouble. It's worth a try though before replacing Ubuntu altogether.