Use the Arduino IDE's Serial Monitor tool, at 115200 bps, to send '1' or '2' and you should get something back from the logic analyzer code if it is running. If you get the debug output, then I would say it is a problem with auto-reset not being fully disabled that prevents the SUMP client from working.
If you can, use a build from github of the newer alternative client that supports device profiles. ( GitHub - jawi/ols: OpenBench LogicSniffer repository ) You'll have to check it out with git and build it yourself with maven. Put the attached file in /ols.distribution/src/main/config for the 'master' branch.
The github built alternative client won't require you to disable auto-reset and it will default to values that work with the AGLA. If you can't build it I could make a known working image available. It is just over 3MB.
Let me know how it goes.
ols.profile-agla.cfg (2.17 KB)