Text display error, character encoding Latin-1?

Looks like the static site is being interpreted as Latin-1 instead of UTF-8? Can't figure out why, since both input and output have ``

Input/Expected Output: ä ö ü
WP2Static Output : ä ö ü

`2020-08-08 09:36:32
PHP VERSION 7.3.20
OS VERSION SunOS localhost 5.10 Generic_150401-49 i86pc
WP VERSION 5.4.2
WP URL http://admin.mypasswordprotectedsite.de
WP SITEURL http://admin.mypasswordprotectedsite.de
WP HOME http://admin.mypasswordprotectedsite.de
WP ADDRESS http://admin.mypasswordprotectedsite.de
PLUGIN VERSION 6.6.7
VIA WP-CLI?
STATIC EXPORT URL http://neu.mypasswordprotectedsite.de/
PERMALINK STRUCTURE /%postname%/
SERVER SOFTWARE Apache/2.4.43 (Unix)
Active plugins:
astra-sites/astra-sites.php
elementor/elementor.php
header-footer-elementor/header-footer-elementor.php
static-html-output-plugin/wp2static.php
Plugin options:
additionalUrls:
allowOfflineUsage:
baseHREF:
baseUrl: http://neu.mypasswordprotectedsite.de
baseUrl-bitbucket:
baseUrl-bunnycdn:
baseUrl-folder: http://neu.mypasswordprotectedsite.de
baseUrl-ftp:
baseUrl-github:
baseUrl-gitlab:
baseUrl-netlify:
baseUrl-s3:
baseUrl-zip:
baseUrl-zip:
basicAuthPassword: *******************
basicAuthUser: obberg-admin
bbBranch:
bbPath:
bbRepo:
bbToken: *******************
bunnycdnStorageZoneAccessKey: *******************
bunnycdnPullZoneAccessKey: *******************
bunnycdnPullZoneID:
bunnycdnStorageZoneName:
bunnycdnRemotePath:
cfDistributionId:
completionEmail:
crawl_delay: 0
crawl_increment: 1
crawlPort:
debug_mode: 1
detection_level: posts_and_pages
delayBetweenAPICalls: 0
deployBatchSize: 1
excludeURLs:
ftpPassword: *******************
ftpRemotePath:
ftpServer:
ftpPort:
ftpTLS:
ftpUsername:
ghBranch:
ghCommitMessage:
ghPath:
ghRepo:
ghToken: *******************
glBranch:
glPath:
glProject:
glToken: *******************
netlifyHeaders:
netlifyPersonalAccessToken: *******************
netlifyRedirects:
netlifySiteID:
removeConditionalHeadComments:
removeHTMLComments: 1
removeWPLinks:
removeWPMeta:
`