How to test:

open firefly
target = m81
WISE image
add a marker
save as PNG or Region file.

No file is saved and the error message is:
RegionDescription.js:87 Uncaught (in promise) TypeError: drawObjs.forEach is not a function
at http://localhost:8080/firefly/firefly-dev.js:90630:19
at Array.forEach (native)
at makeRegionsFromPlot (http://localhost:8080/firefly/firefly-dev.js:90626:12)
at getRegionsDes (http://localhost:8080/firefly/firefly-dev.js:180242:65)
at resultsSuccess (http://localhost:8080/firefly/firefly-dev.js:180256:56)
at onSuccess (http://localhost:8080/firefly/firefly-dev.js:180176:45)
at validUpdate (http://localhost:8080/firefly/firefly-dev.js:80559:26)
at http://localhost:8080/firefly/firefly-dev.js:80570:14
at <anonymous>