How to add MTA-STS policy?

[eXTric]

[SOLVED] V0.50 MTA-STS policy is missing: STSFetchResult.NONE

Just upgraded, and no error during the upgrade, but now every domain name has error msg: MTA-STS policy is missing: STSFetchResult.NONE V0.50 https://github.com/mail-in-a-box/mailinabox/releases/tag/v0.50

It resolve’s itselfnormally