Hello zeb146, welcome back to our community.
Really happy to hear that your RS1D is performing well and providing you with good data!
Is the 404 error happening for every link in the helicorder page? That is, you are not able to see any helicorder image on the Shake?
From the stats everything appears all right, however, could you please download the logs from the Shake (instructions here: Please read before posting!) and attach them to your answer?
Thank you!