Chyba "Failed to load resource: net::ERR_CLEARTEXT_NOT_PERMITTED" na Android 9 a vyšší:
Upravit resources/android/xml/network_security_config.xml :
<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
<base-config cleartextTrafficPermitted="true" />
</network-security-config>
Lepší způsob:
<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
<domain-config cleartextTrafficPermitted="true">
<domain includeSubdomains="true">localhost</domain>
<domain includeSubdomains="true">dev.pretty.cz</domain>
<domain includeSubdomains="true">api.pretty.cz</domain>
</domain-config>
</network-security-config>