InfoPath Dev

Whenever I try to open a SharePoint List in InfoPath 2013, I get an error message saying I cannot open it. "InfoPath cannot open the following form: https://XXXX.sharepoint.com/sites/SOX/XXXXXXXXXXXXX/Lists/Certification of ComXXXXXX/Item/template.xsn Microsoft InfoPath cannot open the selected form template." I tried opening it from SharePoint List and from InfoPath 2013 I don't know what is happening. Is the template corrupted?

Yick. I just tried from my SharePoint Online site and was able to customize in InfoPath... Have you tried doing this the opposite direction? Open InfoPath Designer, select SharePoint List template and enter the list URL? I assume this is happening with more than one list? If you create a new test list, can you customize that in InfoPath?

I tried everything with that one list. I get the same problem when I try opening it from inside InfoPath 2013. I tried with a newly created list and get this message: InfoPath cannot open the following form: C:\Users\UserName\AppData\Local\Microsoft\Windows\INetCache\Content.MSO\65A7E39C.tmp\customXsn.xsn The default view could not be opened. Microsoft InfoPath cannot open the selected form template.

You have all office updates / windows updates installed? Since this is SharePoint Online, you may need to open a ticket with Microsoft.

I asked them and they said that it could be perhaps because of the lack of support for InfoPath 2013 and that I should try moving to PowerApps :(