coinspend: accumulator witness does not verify

Symptoms:

When trying to spend zPIV, the following error appears: coinspend: accumulator witness does not verify

Cause:

A bug in v3.0.5 and v3.0.5.1 affecting some users

Solution:

This issue is resolved beginning with the v3.0.6 release and the binaries are available here

In the Privacy tab, set the security to 100 and rescan/reset the the wallet. If not solved, re-open the wallet and ensure the wallet is completely synced.

Open a ticket if issue isn't fully solved

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