Probably it works with FP6, but fails with FP7, because we had to change the way that computer is identified as render node.
Previously we used an old workaround, but caused some problems with Max 2022. Now we use the method suggested by Autodesk.
Please hold on, while we do some tests here with 3dsmaxbatch.exe.
Meanwhile, you may force to use the old detection method, setting altNetRenderCheck = 1 in forestpack.ini, which is located at
C:\Users\<user name>\AppData\Local\Autodesk\3dsmax\< max version> - 64bit\ENU\en-US\plugcfg
Note this configuration is local to each render node, so you should edit each one of them manually.