The new blogger interface will be applied to all blog in next month.
Some of you updated to new blogger interface and error message suddenly appear when installing a new template.
The reason is very simple . The error is on widgets in template and widgets inside template.
For example ,you added a Popular post widget to blogger when using old template . But in new template, there's no Popular post widget in template itself . So error occurred.
What to do in this situation is to remove Popular post widget in Blogger and re-install later.
This is very different to old Blogger interface. The old one will show a dialog for all widget that not exist in new template and asking for keep these widgets or delete. We can still keep the old widget with all the code added in widget content.
So I recomment you to :
- Do backup before installing any template
- Copy widget content
- Remove all widgets
- Install new template
- Add widget back to templateLabel: blogger, install, interface