i have a web map that i cannot take offline. i get an error when i "enable offline" : Wb map can not be taken offline ... bla bla.
Double check you have followed all the steps in Prepare maps for offline use—Collector for ArcGIS | ArcGIS
If still not working check the ArcServer Manager logs AND the local drive logs.
Main issue we have are unsported symbology, though no reference to such in error message.
can you please specify what should i check in both the arcserver manager and local drive logs.
PS: everything was working fine, until our client decided to change the domain name !
Just read and see if anything gives you a lead though ...
based on everything working before a DNS change ... check none of the map links point to old name.
Use ArcGIS Online Assistant to see.