Thank you for your reply. I should have mentioned in my OP that I had already tried performing the aforementioned upgrade on both the Google Chrome and Microsoft Edge browsers. As per your suggestion, I have made further attempts using incognito mode in Chrome, but to no avail. If you have any specific browser suggestions, please let me know in your reply.
Also, 24 hours prior to creating my OP, I had already tried contacting the Dropbox support team at the same location to which you linked in your reply. Having not received a reply within 24 hours, I created my OP, and oddly, I have not since received any reply from the Dropbox support team in response to my initial enquiry.
Thanks again for your response. Please provide me with any further advice or solutions that you think may help, and/or please escalate my request to the Dropbox support team, if it is in your power to do the same. Alternately, please provide me with an email address to which I can direct the details of my situation. Feel free to reach out to the email associated with my forum profile. Thanks in advance for your time and help with this matter.