I published a DKIM record for my niceoldteacher.com domain that is hosted by fatcow.com and sent an email to one of my gmail accounts to see if DKIM was working. Although the header summary for the received email indicated that SPF, DKIM, and DMARC all passed, I found the following DKIM information in the detailed header and I was wondering about the significance of the dkim=temperror part and if it should be fixed somehow. If so, what do I need to do to fix it? I'm a complete novice at all of this authentication business.
ARC-Authentication-Results: i=1; mx.google.com; dkim=temperror (no key for signature) email@example.com header.s=dkim header.b=2naFLU6D; dkim=pass firstname.lastname@example.org header.s=1557715744.kindoldteacher header.b=OvYU6UvG;