Symptoms
When analyzing or copying a site collection, one of the following messages is displayed:
The site template 'SiteTemplateInError' specified at the destination is not valid for a Site Collection. Please specify a valid site collection template for language 'LanguageInError' with the Map Site Templates option.
Error code
AN-031-164
Details
The site template mapping for the source site's template is not a valid Site Collection template.
Solution
You need to modify your site template mappings to correct this error. Associate a valid destination site collection template with the source site's template.
You can find more information about site template mappings here.