The latest stable release of the MailChimp extension for CiviCRM isn't installing on our Civi 5.3.2 via the Civi internal extension installer. Admin interface displays
Sorry, due to an error, we are unable to fulfill your request at the moment. You may want to contact your administrator or service provider with more details about what action you were performing when this occurred. DB Error: unknown error
PHP error log shows no related errors. Also getting the following when coming back to the Civi admin interface after checking the log:
UDATE: On my fifth or sixth attempt to install, it finally worked. Didn't change anything prior to this. No idea why.