You don't use a .tlog to tag images.
Connect to the solo with your laptop and download the bin log via mavlink from the solo. You can then convert the .Bin to a .log file in mission planer and you can use that to tag the images,
It can take ages to download a log over mavlink. so if your computer savvy you ca ssh or sftp into the solo and download the log, much quicker.
I have not been able to get my GoPro to trigger during a tower survey mission. Have all the latest versions installed of Tower and GoPro software. Its a new Solo with latest updates. I can take pictures and video via the Tower application but the tower application will not trigger the camera, I so have the Do Set Trigger Distance and a distance included in the mission,
Any Ideas what to try next?