When I select  'go flying' it offers the option of internal location services or skyecho as usual, but if I select skyecho a 'protocol not available' banner appears and it does not function.

The internal GPS seems to work happily with Skydemon as usual.

Since this is common to two tablets and I have no such problem with another tablet I assume it is some kind of incompatibility /update that has triggered this and others would have experienced the same issue- I've searched the forum and cannot find any reference, so has anyone else observed this or am I missing something well known?