Hi There! I am apparently collecting completed tasks. Other projects complete and upload, so that part seems good, but I now have 6 files that need to be uploaded. They do keep retrying, to no avail. Any ideas?

There is another thread on this. It has been reported to the project. The most common reasons for this are a server running out of disk space (this one is normally evident in the message the event log gives), a network problem, or a script which needs restarting on the relevant server. Assuming you have the same problem as the others I have read, this one is most likely, either network or server script as the event log is saying something like,

Started upload of wah2_eas50_a23q_201212_12_686_011361874_1_r1920095199_1.zip 39928
03-12-2017 12:00 Project communication failed: attempting access to reference site 39929 climateprediction.net
03-12-2017 12:00 Temporarily failed upload of wah2_eas50_a23q_201212_12_686_011361874_1_r1920095199_1.zip: connect() failed 39930 climateprediction.net 03-12-2017 12:00 Backing off
03:41:37 on upload of wah2_eas50_a23q_201212_12_686_011361874_1_r1920095199_1.zip 39931
03-12-2017 12:00 Internet access OK - project servers may be temporarily down.