@arunk85184451 we too faced with such an issue. For us it seems was related to broken symlinks.
/dispatcher/src/conf.d/enabled_vhosts/default.vhost is a symlink to /dispatcher/src/conf.d/available_vhosts/default.vhost the same /dispatcher/src/conf.dispatcher.d/enabled_farms/default.farm is a symlink to /dispatcher/src/conf.dispatcher.d/available_farms/default.farm
After working with the code in Windows we've found that symlinks became broken. Quick fix for us - copy content from origin available_vhosts/available_farms to enabled_vhosts/available_farms (so we have real content instead of reference to another files). Not sure if this is a good solution, but it helped. Btw, not clear how such a symlinks should work in Windows.
But as per the error log. , what i understood is there is some issue in the apache configuration i.e. in the typical AMS dispatcher structure you need to inclide all the available vhosts as part of enabled vhosts.