OK, here's the file, hopefully I did everything correctly
When looking in the file, I do see the IPv6 echo requests going from your computer to the router. I do not see anything coming back, no errors, no responses. I'll think about the next step in debugging and reply later (maybe today, maybe another day).
Notice that you can attach files directly in this forum. There is no need to use third party sites for such attachments. And that particular site you uploaded the file to looked a bit fishy. It was difficult to find the correct download link due to the download links to various exe files all over the page.
Additionally, I'd like to have you check again that the router is showing the expected IPv4 address on the WAN interface. I guess you find that under "Status" or under "Basic", "WAN Setting".

Four virtual interfaces with two IPs. I am wondering what criteria the router use to choose between them. Also the IP seen there is different from the one you mentioned earlier.
Does that mean your public IP is dynamic and it changed since your first post? Or is your router actually using the RFC 1918 address and going through another layer of NAT with the previously mentioned IP address being the public IP address of the other NAT?
If the problem was just that the IP had changed and you didn't get it updated on the tunnel server, then the packet trace you uploaded should have shown ICMP errors from the tunnel server, but there were no such errors in the trace.
If you look on each of your posts in this thread, then in the lower right corner you can see, which IP you posted from. Can you tell us, what is showing up there?