Adobe CC apps fail to update and/or install

you're welcome. 

to help others, what was the solution.

Thank you. That was a great suggestion, and it worked. I was handed over to a human being by the bot, and the technician was brilliant and has solved my issue. Such a relief. Thank you so much for your advice. Very much appreciated!! 🙂

https://community.adobe.com/t5/download-install-discussions/installation-error-105/m-p/13450836#M565336

there are 2 ways to contact adobe support; chat and twitter (now x):

chat:
if you have or want to purchase a subscription, use a browser that allows popups and cookies
and click here, https://helpx.adobe.com/contact.html?rghtup=autoOpen
in the chat field (lower right), type AGENT
be patient, it can take quite a while to reach a human.

twitter/x:
tweet @AdobeCare

p.s. if you're contacted by anyone (via email or private message), it's much more likely to be a scammer than an adobe representative.