Many wp backend notice

hi, i’m testing your plugin from my demo test site and i get several php and js error. i use last version of wordpress and wp default theme (2019). From the backend page of map i get:

<b>Notice</b>:  Undefined index: locate-anything-marker-html-template in <b>.../wp-content/plugins/locateandfilter/public/class-locate-and-filter-public.php</b> on line <b>778</b><br>
<br>
<b>Notice</b>:  Undefined index: locate-anything-lat in <b>.../wp-content/plugins/locateandfilter/public/class-locate-and-filter-public.php</b> on line <b>953</b><br>
<br>
<b>Notice</b>:  Undefined index: locate-anything-lon in <b>.../wp-content/plugins/locateandfilter/public/class-locate-and-filter-public.php</b> on line <b>954</b><br>
<br>
<b>Notice</b>:  Undefined index: locate-anything-lat in <b>.../wp-content/plugins/locateandfilter/public/class-locate-and-filter-public.php</b> on line <b>953</b><br>
<br>
<b>Notice</b>:  Undefined index: locate-anything-lon in <b>.../wp-content/plugins/locateandfilter/public/class-locate-and-filter-public.php</b> on line <b>954</b><br>
<br>
<b>Notice</b>:  Undefined index: locate-anything-lat in <b>.../wp-content/plugins/locateandfilter/public/class-locate-and-filter-public.php</b> on line <b>953</b><br>
<br>
<b>Notice</b>:  Undefined index: locate-anything-lon in <b>.../wp-content/plugins/locateandfilter/public/class-locate-and-filter-public.php</b> on line <b>954</b><br>
<br>
<b>Notice</b>:  Undefined index: locate-anything-lat in <b>.../wp-content/plugins/locateandfilter/public/class-locate-and-filter-public.php</b> on line <b>953</b><br>
<br>
<b>Notice</b>:  Undefined index: locate-anything-lon in <b>.../wp-content/plugins/locateandfilter/public/class-locate-and-filter-public.php</b> on line <b>954</b><br>

and from browser console:

Uncaught SyntaxError: Unexpected token <

3touch-keyboard-navigation.js?ver=1.1:190 Uncaught TypeError: Cannot read property 'querySelectorAll' of undefined
    at removeAllFocusStates (touch-keyboard-navigation.js?ver=1.1:190)
    at HTMLDocument.<anonymous> (touch-keyboard-navigation.js?ver=1.1:313)

i have error also from the backend page of the post:

Notice: Undefined variable: post_type in /var/www/vhosts/h650474.linp069.arubabusiness.it/demo.kootj.eu/wp-content/plugins/locateandfilter/admin/partials/locate-and-filter-metabox-post.php on line 3

(in each input field)
<b>Notice</b>: Undefined index: locate-anything-street in <b>/var/www/vhosts/h650474.linp069.arubabusiness.it/demo.kootj.eu/wp-content/plugins/locateandfilter/admin/partials/locate-and-filter-metabox-post.php</b> on line <b>20</b>

do you offer a paid support service?