Main brush error

I'm getting this same error over and over.  I've cleaned everything multiple times and have now tried two new main brushes.  The vacuum is useless at this point.

I just started getting this error yesterday. There is nothing tangled in the main brush. I have done all of the suggestions and am still getting the error. Please help!

Has anyone had any luck clearing this error after setting robot back to factory settings?  Mine just started yesterday. I am over it already!

Hi to all,
we had the same exact issue on our x50 Master, as it stopped every 2 feet and said "brush tangled" even if there was nothing inside... we tried everything but nothing worked so we contacted the support and sent it over to them. Waiting now 18 days and we have not got any reply or message from them with a status update...
Keep you updated...