Upgrade to pkg_rca_jea_basic 1.0.27, clear administrator cache, and retest. Releases 1.0.22 through 1.0.27 address form field registration, view tmpl paths, permission objects, and toolbar actions on J4 admin.
Confirm API keys in options. Release 1.0.19 removed invalid async loading on the Maps script that caused LatLng constructor errors on some sites.
Releases 1.0.17 and 1.0.18 fixed empty gateway type defaults on New gateway. Upgrade and clear cache if Gateways, New fails with loadForm errors.
Compare your template overrides to default com_rca_jea tmpl files in the installed package. Restore overrides from backup or diff against a clean install on staging.
Collect pkg_rca_jea_basic version, Joomla version, PHP version, and a log excerpt. Use Support contact with steps to reproduce on staging when possible.