glossary problem on php 7.2

i get the following error in console

{type: “notice”, message: “Undefined index: tooltip”, file: “wp-content/plugins/glossary-by-codeat/public/class-glossary.php”, line: 45, stack: Array(5), …}
component
:
“Plugin: glossary-by-codeat”
file
:
“wp-content/plugins/glossary-by-codeat/public/class-glossary.php”
line
:
45
message
:
“Undefined index: tooltip”
stack
:
(5) [“Glossary->__construct()”, “Glossary::get_instance()”, “Glossary_Admin->__construct()”, “Glossary_Admin::get_instance()”, “do_action(‘plugins_loaded’)”]
type
:
“notice”
__proto__
:
Object