Error after uninstalling Let's Encrypt

Configuration
1

Hey,

I configured Let’s Encrypt (via add-on from hassio) to use with domain name and public IP. It worked but I was not convinced to follow this apprach so I uninstalled Let’s Encrypt ad-on. Now I get following error when trying to configure UniFi integration (UniFi uses https):

Certificate did not match expected hostname: 192.168.xxx.xxx. Certificate: {
	'subject': ((('commonName', 'xxx.xxx.pl'),),),
	'issuer': ((('countryName', 'US'),), (('organizationName', "Let's Encrypt"),), (('commonName', "Let's Encrypt Authority X3"),)),
	'version': 3,
	'serialNumber': '03D2...',
	'notBefore': 'Nov  7 17:16:23 2018 GMT',
	'notAfter': 'Feb  5 17:16:23 2019 GMT',
	'subjectAltName': (('DNS', 'xxx.xxx'), ('DNS', 'yyy.yyy')),
	'OCSP': ('http://ocsp.int-x3.letsencrypt.org',),
	'caIssuers': ('http://cert.int-x3.letsencrypt.org/',)
}

192.168.xxx.xxx is my Hass.io IP, xxx.xxx, yyy.yyy are domains I had configured using Let’s Encrypt. It seems the information about cert is stored somewhere and not purged after deinstallation of ad-on. How can I fix it?