In article ,
says...
Aftere much chasing in circles I eventually saw a hint which led me to
discover that the culprit was the anti-ransomware protection of my
Acronis backup software that was causing the problem. Setting that to
'OFF' has solved the problem.

Holy ****. Not the first time I hear anti-virus or other
internet protection SW causes problems.
--
Alfred Molon

Olympus 4/3 and micro 4/3 cameras forum at
https://groups.io/g/myolympus
https://myolympus.org/ photo sharing site