To be honest my immediate answer would just be update to the 2017 version of InDesign as it has various improvements and bug fixes anyway and will be supported better as you have the CC version of InDesign.... However if you feel that 2015 is the version for you then I suppose the following methods would be worth trying:
I'd guess that the best think to do first would be to restart your computer in safe mode and see if the programme works then.
If that fails i would recommend, basing this on the fact you state you have creative cloud versions of disabling the cloud application and also/or try disabling the internet connection - then retry launching the InDesign.
Failing this you would be be best to essentially "debug the version" of InDesign 2015 by either re-installing or if you have the option to verify the integrity of the files for the 2015 version.
Hope this helps.
I suggest the first thing you do is reset your InDesign preferences:
Close and relaunch InDesign, and IMMEDIATELY hold down Ctrl + Alt + Shift (Windows) or Cmd + Ctrl + Opt + Shift (Mac), and respond in the affirmative to the dialog asking if you really want to replace the preferences. You must be extremely fast on the keyboard (if you don’t see the confirmation prompt, you were too slow).
You may need to do this a couple of times before getting the hang of it!
Can you please share the error screenshots on launching InDesign CC2015?
Hi Jaguar 1991,
thanks for your response. Yes, I´ll upgrade soon to the 2017-version. Just for now I have to get it working. It seems that it was the InDesign preferences.
Thanks :-) It obviously was the preferences setting! It now works perfectly again.
Regarding recommendations that you upgrade to CC2017, if you do I suggest you also keep CC2015 as well, in case you find, as many have, the current version a bit flakey!