After Nanowallet is deactivated, it cannot be activated again

Tech Support
#1

I used Nanowallet to deactivate delegated harvesting. When I enabled activation again, an error occurred and I could not activate. Error code: FAILURE_IMPORTANCE_TRANSFER_IN_PROGRESS
Ask the official developer to help me

#2

You have to wait 6 hours to finish deactivation.

#3

When I started to delegated harvesting, this error occurred again and again. Why? help me

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#4

Please give screenshot from harvesting page and your NEM address too.