In updating Mozilla VPN, I received the error message, "The older version of Mozilla VPN cannot be removed. Contact your technical support group."

I tried to update from Mozilla VPN v. 2.36 to v. 2.37 by clicking the Update button in the message I received. I did not shut down the old version first. When I received the "old version is running" message, I clicked the "automatically close app" selection. All seemed to be going well until a message popped up saying "The feature you are trying to use is on a CD-ROM or other removable disk that is not available. Insert the 'Mozilla VPN' disk and click OK." When I clicked OK, a message said "The path " cannot be found. Verify that you have access to this location and try again, or try to find the installation package 'MozillaVPN.msi' in a folder from which you can install the product Mozilla VPN." I found the folder containing the MozillaVPN.msi file, but when I use it to restart the installation, I end up with the same error message. If I click Cancel instead of OK on the "Insert the disk" message, and error message pops up saying "The older version of Mozilla VPN cannot be removed. Contact your technical support group." Now my old version is gone, but I don't have a new version to use. What should I do now?