Hi all,
I have compared my old exported file and new exported file and I found the different is in the key "webapplication" of 'cms_info.xml.export' file. This key changed from False to True. I guess this is root cause, but I don't understand why this value is changed.
This is value in "cms_info.xml.export" of error package:
<cms_info>
<Key>webapplication</Key>
<Value>True</Value>
</cms_info>
Thanks!