Unfortunately no one is maintaining these Pi scripts, to my knowledge.
As time passes, things change, pi software changes, Bisq software changes, things are bound to break over time if not properly maintained.
I hope there are still other Pi users around running Bisq that could answer you, but I’m afraid you will have to hack it yourself if you can.
If you do, posting your solution here will definitely be appreciated by other Pi users that my look this up here in the future (as well as the whole community of course :).
The biggest problems as I remind with Bisq/raspberry :
1/ (as usual softwares) Bisq relies on many libraries … and sometimes those libraries are available for raspberry, and 6 months later no more.
Last time I had a look, torbrowser was not available for raspberry, for the same kind of reason.
2/ The last guy who succeeded with Bisq on Raspberry said it was too slow to be really usable. Certainly due to the small RAM. And there is no cure for that with the existing rasp models.
I was able to launch the unmodified Bisq jar file on RPi 3B+ using BellSoft JRE 10.0.2 and Gluon OpenJFX 11.0.2, however Bisq doesn’t seem to communicate through the network (tcpdump shows no traffic). What might be the reason, and how could I troubleshoot it? Looks like something is preventing JRE from accessing the network…