Hi,
I had the same error today!
After updating Helix LT Firmware to 2.91 (via HX-Edit 2.9) some days ago my Helix LT worked fine until today!
When I tried to save a preset or tried to load a new preset the error 8212 occurs (message: timeout waiting for a response from device) !
Change of PCs USB port, restart of PC - nothing seems to help!
After all I powered off the Helix LT, and powered it on again. Now it seems to work as before! :-)
Strange ...
Kind Regards
Bernie